Santa-NK1 is a Hardmode, mini-boss that spawns during the Frost Moonevent. When below half health, the face and beard of the Santa mask will be torn apart to reveal a rather morbid skull underneath.
Santa-NK1 repeatedly cycles through three attack phases:
First phase: Chain gun fires bullets at the player.
Second phase: Presents launch high, then rain down via parachute from above, causing damage on contact with players. These travel through blocks.
Third phase: Rocket barrage. These also travel through blocks.
While moving, it also drops large spiked balls on the ground that deal high damage (120-150+ with Chlorophyte armor). These increase in frequency as Santa-NK1 takes damage.
Notes
The drop rate linearly increases from Wave 13 (or 15) to 20.
Santa-NK1 currently has one of the highest damage rates in the game.
He also has one of the highest defenses in Terraria, at 56.
Tips
Note that his Present launch and rocket barrage attacks are highly inaccurate.
If you use wings you can fly over him back and forth and make it harder for him to hit you with the chain gun and the rocket barrage
Trivia
"Santa-NK1" is a play on the phrase "Santank" (ie. Santa Tank), the name used when the enemy was announced.
Its arm appears to be the Chain Gun, which it sometimes drops.
Template:Mobile icon In the Mobile version, Santa-NK1's face does not get torn off when its health is depleted, instead will tear off upon death.
History
1.2.3.1: Its Projectiles are fired slower and do less damage.