Santa Claus

Santa Claus is an NPC added in the 1.1.1 update obtained after completing the Frost Legion event triggered by a Snow Globe. Santa Claus is only available during Dec. 15 - 31st each year, as stated by Re-Logic in the release notes. As of the 1st of January every year, Santa Claus will no longer be available until the next Christmas period. Existing Santa NPCs will either despawn or die, indicated by a 'Santa was slain' message. However, if you set your computer time to a time between Dec. 15-31st, he will respawn.

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Requirements
After completing the Frost Legion Santa Claus will arrive if there is a house which meets the standard NPC requirements (Light, table, chair etc.) and does NOT need rescuing/unbinding from the world.

Quotes

 * What? You thought I wasn't real?
 * Care to bake me some cookies?
 * Ho ho ho, and a bottle of... Egg Nog!

Bugs
v1.1.1 - Santa Claus is scripted to spawn even outside of the holiday season, but he will immediately die.