水晶雪球 是用于在 困难模式 中召唤 雪人军团 事件 的物品。它可以从 圣诞节 事件期间(即十二月15-31号)掉落的 礼物 获得，但是这些礼物必须在困难模式中打开，掉落的概率为 6.67% (1/15)。它可以在任意世界任意时间使用。
- Snow Globes will only appear from presents opened in a 困难模式 world. Note that 礼物s can be obtained in pre-hardmode world but their content depends on the world they are opened in, not where they are dropped.
- The activating player must have at least 200 max health to start the event (The Snow Globe will not work otherwise).
- Defeating the 雪人军团 during the 圣诞节 event will cause the 圣诞老人 NPC to spawn.
- Setting your computer's clock to 15-31 December will initiate the Christmas event.
- Even if the player brings a Snow Globe to a pre-hardmode world (after 礼物s were opened in Hardmode world, see notes), its is not advisable to do so without preparation. The Frost Legion should only be summoned once the player has acquired Hardmode gear, as they are considerably stronger than the 哥布林入侵. It is almost the Christmas equivalent to the 海盗入侵.