Insidious/The Mask

The Mask is a Pre-Hardmode Jungle boss designed to be fought around the Eye of Cthulhu.

Spawn
The Mask doesn't spawn naturally and requires the player to summon it with the Tiki Totem while in the Jungle at any time The Mask isn't already present.

Behaviour
During The Mask's First phase, it stands motionless, every 6-10 seconds it will teleport above the player, the boss will display particles before it teleports.

Additionally if there is less then 2 possessed masks present, the boss will shoot two projectiles which on death will summon a possessed mask each, if there are two or more possessed masks present and less than two jungle bats present it will summon Jungle bats instead.

When it is below one third health it will transform into phase two. During phase change, four possessed masks will be summoned

In Phase 2 The Mask will fly around shooting lasers at the player no longer summoning enemies.

Expert Behaviour
In Expert mode it will no longer summon Jungle bats, if there is less than 3 possessed masks present it will summon them. The summoning is triggered more frequently.

In phase two, it will summon a possessed mask simultaneously to shooting a laser.