The 水晶雪球 is a 困难模式 item used to summon the 雪人军团 事件. It can be obtained from 礼物s (dropped during the 圣诞节 event, December 15th-31st), which must be opened specifically in Hardmode worlds, with a chance 6.67% (1/15). It can then be used in any world at any time.
- 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.