Santa-NK1

Santa-NK1 (also known as Santank) is a boss that spawns during the Frost Moon event. When below half health, the face and beard of the Santa mask will be torn apart to reveal a rather morbid skull underneath.

Attacks
Santa-NK1 repeatedly cycles through three attacks:


 * First attack: Chain gun sprays bullets in the player's general direction.
 * Second attack: Presents launch high, then rain down via parachute from above, causing damage on contact with players. These travel through blocks.
 * Third attack: 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.

Trivia

 * "Santa-NK1" is actually a play on the word "Santank" (ie. Santa Tank), the name used when the enemy was announced. It may also be a reference to the name of the person the story of Santa is based off, "Saint Nick" (Saint Nick is the holiday they celebrate in the Netherlands and Santa is a the American version) (NK1 = Nick).
 * Santa-NK1's robotic Santa concept could be a reference to the Robot Santa Claus from Futurama.
 * Its arm appears to be the Chain Gun, which it sometimes drops.
 * It may be a reference to the movie series The Terminator, as the robotic skull resembles the Terminator without the human disguise.
 * It may be a reference to the game Smash TV, where an animatronic humanoid on tracks (whom's skin can be melted off, revealing the robot chassis) is one of the bosses at the end of a stage.