天界塔（或“柱”）是四只在月亮事件中生成的头目。会在地图的四个预定点（西方两座，东方两座，详见Celestial_Tower#Pillar_Spawning_Mechanics）。天界塔会在拜月教邪教徒被击败后生成。四座天界塔分为漩涡塔，星尘塔，星云塔和日光塔。四个塔对应着游戏中的四个专业：漩涡对应Ranged weapens（远程型武器），星尘对应Summoner weapons（召唤型武器），星云对应 Magic weapons（魔法武器），日光对应Melee weapons（近战武器）。一个天界塔会掉落12-90个碎片，掉落数量与它们的类型和世界的模式有关。
星旋碎片 (12-60 / 18-90)
星尘碎片 (12-60 / 18-90)
星云碎片 (12-60 / 18-90)
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灭星者 • “打败月亮上的四个天塔。”
|Defeat all four Celestial Towers.
- You can tell if you have reached the kill count or not by seeing if after killing an enemy, a coloured line travels from the corpse to the Pillar. When those lines stop being created, the kill count has been reached. Another way to tell is the moment you reach the kill count, the force field surrounding the pillar sends out a huge shockwave in all directions, which is very difficult to miss.
- A quick and effective way to kill all of the Celestial Towers is to use the North Pole directly and vertically above a Pillar. Even if a player does not have any melee modifiers, if all of the snowflakes can make contact, the Pillar should fall in less than 20 seconds.
- Another strategy is to use the Nimbus Rod and/or Crimson Rod (the Rainbow Gun might help as it lasts a few seconds) as you can summon two above the Pillar and let it deal constant damage. If you leave a nimbus cloud above the tower and teleport away, it will still do damage until either the tower dies or the cloud runs out. This tactic can be combined with Spectre Armor and a Spectre Hood for long distance healing, as the healing effect has a very long range.
- You can also use Minions (or a Spore Sac) while taking cover in a hole to do a safe kill. Take a note that some enemies can travel through blocks. This is extremely effective for the Vortex and Solar pillars. Using something like the Daedalus Stormbow also helps.
- Some other weapons might be more effective, but they are not obtainable until the first Pillar is destroyed. Therefore, if you decide to start with the Vortex Pillar, using the Phantasm will be incredibly effective for the other Celestial Towers. The Solar Eruption (from the Solar Pillar) also deals massive piercing damage and is very effective as well.
- Some Pillars and their enemies seem to be weak to their own weapons. For example, the Nebula Pillar is weak to the Nebula Blaze and Nebula Arcanum.
- The longer the time taken to defeat a Pillar, it will sink deeper into the ground, but very slowly.
- Repetitively throwing Vampire Knives will keep you healed most of the time, and if you get to less than 150 hp, use a Greater Healing Potion or higher. This will slowly take out the enemies and the pillar itself. Switching to another weapon is a bad idea, unless you have full Spectre Armor with a hood, though following this strategy, you should have Beetle Armor.
- The shield surrounding the Celestial Towers becomes more transparent as it becomes closer to breaking. This is a good indicator of when the shield will break and leave you able to damage the Pillar.
- The hardest Celestial Tower to deal with is the Nebula pillar as it is the only pillar whose enemies can deal massive damage, even if the player is underground or in a bunker.
- The easiest way for players to deal with the Celestial Towers is to use a weapon which can hit through blocks, such as the Death Sickle, and mine tunnels starting from just outside the event zone until you can reach the pillar with your chosen weapon. All that's left to do is to grind though any enemies which converge above your location.
- It is strongly recommended that you take down the Solar Pillar first as it will allow you to craft the Solar Eruption which will speed up the process.
- Alternatively, defeating the Nebula Pillar first will allow the player to craft a Nebula Arcanum, which with a good modifier can take down all of a pillar's HP in the amount of uses it takes to use up all the player's mana. Using certain armor sets and/or equipment with the arcane modifier will make mana last longer, more effectively defeating the Pillar and remaining enemies.
- You can use the GPS to know the depth of one Pillar then build/expand your nearest building of the pillar to this depth and shoot on it with Rocket Launcher with Rocket IV then Rocket III or Sniper Rifle. Rocket IV will destroy the obstacles and Sniper Rifle/Rocket III will kill the Pillar. The time the rocket takes to hurt the pillar can however be long : in a large map, a rocket IV takes ~1 min to travel from the center of the map to the farthest Pillar.
If you see a swirling portal form in midair, keep your distance and move quickly. The portal will either shoot a lightning bolt similar to the Lunatic Cultist's attack or spawn an Alien Hornet. When the portal shoots a lightning bolt, there will be a blue swirling marker pointing towards the direction the lightning bolt will strike at. Lighting bolts will only shoot downwards. The Vortex Pillar will always spawn Alien Hornets on back-walls with a direct line towards the player if there are any on the player's screen. If not, it can spawn Alien Hornets anywhere within an approximate 300 block radius of the tower.
- Because most of the enemies try to stay at the same elevation as the player, with the exception of Alien Queens, staying on the ground removes much of the mobility that Alien Hornets and Storm Divers have.
- This is the only pillar where no enemies or projectiles can travel through blocks, making the strategy of taking cover very effective. However, it is somewhat slow as many enemies keep their distance.
- Avoid getting swarmed by Alien Queens, as they easily grow from Alien Larvae and Alien Hornets and the Distorted debuff greatly decreases your flighting and agility. If you are overwhelmed, explosives may prove effective.
- Using splash-damage weapons on Star Cells is perhaps the easiest way to kill them, as it will destroy all of the split cells as well as the initial cell.
- A quick and easy way to break the shields (especially on expert worlds) is to lead a star cell away from the tower, pop it into its smaller orbs, then let those orbs grow into full star cells. This creates an infinite loop, and the new star cells will also count towards the breaking of the shields.
- Arguably, the Stardust Pillar is the easiest of the lot; its enemies are predictable and slow in their motions, and with focus, even the most menacing of the lot, the Flow Invader, can be easily countered.
- On death, the Flow Invader will hurl up to three projectiles directly at you (potentially fewer if it is freshly spawned and hasn't yet accumulated its full contingent of orbiters). Be ready to dodge when you kill this creature.
Milkyway Weavers can be easily slain by using splash-damage weapons on them as soon as they burrow out of the ground. This will ensure that even if your projectile doesn't strike their head directly, it will still deal splash damage as it hits the ground next to it.
- When fighting, take caution to avoid getting hit by a Brain Suckler. They cause the Obstructed debuff, which is similar to Blindness but with a darker shader. It will persist until you kill the Brain Suckler stuck to you, and for a moment thereafter.
- Be very wary of Nebula Floaters. They do high damage with high accuracy, and their tendency to teleport - especially when harmed - can make them unpredictable. Nothing prevents a Floater from teleporting directly in front of you and firing at point blank; if you wouldn't survive another shot and can't heal up, it may be best to retreat and recover.
- Kill Evolution Beasts quickly, because once they get in range they will fire a slow but highly damaging ball of energy that tracks the player, passes through walls can deal continuous damage, and only expires after a few seconds. These will force the player to move around into other hazards and enemies.
- Keep an eye out for Predictors because they will stay at distance, not attempting to get close to the player, and shoot several Nebula Piercers in a similar fashion to how Storm Drivers fire their shotguns.
- KEEP MOVING. While digging a bunker and attacking from there works for the most part for the other pillars, the Nebula Floater will make short work of you if you try that approach here.
- While fighting the Solar Pillar enemies, it is highly recommended to stay grounded. Airborne players are easy prey for the Crawltipede minions, who do an excessive amount of damage but only attack airborne players.
- If you have a skybridge set up in your world, standing on it will allow you to shoot down at enemies on the ground and even the pillar without being targeted by the Crawltipedes. Keep in mind Srollers will still be able to jump up to the platform and roll towards you.
- If you already have problems killing the enemies to get the shield down, an easy solution is to dig a tunnel under the Pillar and use weapons that go through walls like the Death Sickle or the Nettle Burst. It will help a lot using the Spore Sac (Plantera Expert Item) and a random minion. You can also kill the Pillar using a wall-piercing weapon. If it is stuck on a hill, you can build a non-platform bridge to it without being assaulted by Crawltipedes. It may be wise to prioritize Corites, as they can and will attack you without regard to intervening terrain.
- If you are low on health, and you are wearing wings, a good strategy for regaining health is to alert a crawltipede and hit it with Vampire Knives. Due to the fact that they take ten times as much damage as any other enemy and have a high amount of health, it is a good way to build up health fast; provided you can dodge the Crawltipede itself. However, if you are struck by the Crawltipede with low health, you will most likely be slain.
- It is highly suggested not to use bullets, arrows or Meowmere, at least not on Selenians as they can reflect bullets that deal the same damage they would have dealt to the enemy. Powerful weapons of those varieties can easily be turned against you and you can die very quickly. Selenians, however, cannot reflect Rockets, so it is suggested to use those against them if you are to play ranged.
- If you have a Neptune's Shell, a combined accessory with its effect, or Gills potions, then standing in a large pool of water under or near the pillar will allow you to move around off the ground, without being targeted by Crawltipedes. In addition, this will also cause most enemies, with the exception of Corites, to move slower, and make it easier to target them. Srollers seem to stand still in the water, making it incredibly easy to target them. This strategy also works well with Vampire Knives, allowing you to heal more efficiently. Can be done easily with pre-Plantera armors, such as Chlorophyte.
- If available, the Scutlix Mount improves forward firepower and ground maneuverability considerably, making the fight much easier.
- When fighting the Solar Pillar, try building a small building with doors, platforms, and make it two floors tall, right on the edge of where the tower starts spawning enemies, to help block off some enemies from swarming you(especially the Srollers who can deal very large amounts of damage on Expert Mode), and to force them into a small and easy to defend area. Only the Corites will fly through walls.
When it is time for the 4 pillars to spawn, the game follows these steps: (The coordinates are in tiles)
- Randomly arrange the order of the 4 pillars.
- Multiply the width of the world by 0.2, 0.4, 0.6, and 0.8 to find rough spawn locations for the pillars, equally spaced from each other and the world's edges.
(For example, a large world is 8400 tiles in width, so the 4 pillars will be spawned at somewhere near x=1680, x=3360, x=5040 and x=6720)
- For each pillar:
- Pick a random x1 coordinate in the range [x0 - 100, x0 + 100], where x0 represents the x coordinate of the location the Pillar was assigned to.
- Try to find out a possible y1 to spawn the pillar at (x1, y1). The y1 is processed from the 0' surface point to somewhere 100 tiles below the top of the world, from low to high. This place is a valid spawning space for a pillar if:
- There are no solid blocks (doesn't include platforms and other similar tiles) in the rectangle of x coordinate [x1 - 10, x1 + 10], y coordinate [y1 - 20, y1 + 15] (the smaller the y is, the higher height the spot lies)
- The pillar will be outside the player's sight, checking whether tiles (x1 - 10, y1), (x1 + 10, y1), (x1 - 10, y1 - 20), (x1 + 10, y1 - 20) are all outside a rectangle centered at the player with a width of 1920*1.2 pixels and a height of 1080*1.2 pixels.
- If a y1 works then the pillar spawns at (x1, y1).
- If none of the valid y1 works, go back to the first step
- If all steps have been run 15 times and failed, give up and just spawn at a settled point: (x0, y0 - 40), in which case the Pillar will always spawn at 80' Underground at a fixed x coordinate.
- The Nebula Pillar is the only pillar to not have an attack that damages directly, as the Solar Pillar attacks with solar fragments, the Vortex Pillar summons portals that spawn Alien Hornets or create bolts, and the Stardust Pillar attacks by summoning white portals that either spawn Star Cell, Milkyway Weaver or Flow Invaders.
- The Stardust Pillar's naming is a refrence to Jojo's Bizzare Adventure Part III: Stardust Crusaders. This is the specific arc in which stands (essentially summons) are introduced.
- The Celestial Towers, Lepus and Turkor the Ungrateful are the only bosses that don't drop trophies.
- All of the towers have a humanoid enemy. Vortex Pillar: Vortexian and Storm Diver, Stardust Pillar: Stargazer, Solar Pillar: Selenian and Drakanian, and Nebula Pillar: Predictor.
- If the Lighting mode is set to color or white, the shield will have a distort pulse effect, making players around it have a shockwave effect. And when the shield is down, the area nearby get the shockwave effect. When the lighting is on retro or trippy, these effects won't occur.
- When in a lunar area, depending on the pillar, the entire area nearby will turn a color. (solar-orange, vortex-teal, nebula-magenta, stardust-blue) (the effect will only occur if the lighting mode is on color or white).
- When switching lighting modes, the stardust pillar is the only pillar with a background with the color that's not another shade (the planet on color and white is blue, on retro and trippy it's white, the color shade in the background is light blue on color and white, and purple on retro and trippy).
- Vortex Pillar is the only pillar that has a background planet with a ring.
- Reversing gravity with a Gravitation Potion or Gravity Globe has a strange effect on a pillar's shield. Instead of being stationary around the pillar like it normally would, its vertical position changes according to its relation to the player. This is only cosmetic, as the pillar cannot be attacked when the shield appears to be removed.
- If a pillar has no shield and the world is closed, it will have full health and the shield will be restored when the world is reopened.
- This is the only event during which enemies don't drop coins.
- If you watch closely, The towers, Moon Lord and Martian Saucer seem to have a higher resolution than most sprites. (Most Terraria monsters are pixelized.)