Prong

Prong is one of the bosses added in Revelations Chapter Two, and can be found in the Glacier.

Behavior
Phase 1 Phase 2(starts at under 75% HP) Phase 3(starts at under 50% HP) Phase 4(starts at under 25% HP)
 * Prong will spawn in a pit filled with water in the centre of the room, gasping for air. Afterwards, he will wave his flippers towards the player and dive back into the water. This animation may be delayed until a short period after the room is entered.
 * Prong will whistle, which will cause an ice worm to spawn.
 * Prong will poke his right eye with his right flipper and his tusk will glow, causing an icicle to appear above the player. The icicle will fall after a short period that splits into shots in the cardinal directions.
 * Prong will surface balancing an ice hazard on his tusk, which will then fall off.
 * Prong will break 5 segments of the arena, leaving only 3 segments to move on.
 * Keeps all attacks from previous phases.
 * Prong will break 1 segment of the arena, leaving only 2 segments to move on.
 * If an ice worm is on the segment as Prong breaks it, they will be skewered and Prong will eat them. This will heal a small amount of Prong's health, and cause Prong to vomit shots in the player's rough direction.
 * Keeps all attacks from previous phases.
 * Prong will break 1 segment of the arena, leaving only 1 segment to move on.
 * If an ice worm is on the segment as Prong breaks it, they will be skewered and Prong will eat them. This will heal a small amount of Prong's health, and cause Prong to vomit shots in the player's rough direction.
 * Keeps all attacks from previous phases.

Champion Version
Phase 1 Phase 2(starts at under 75% HP) Phase 3(starts at under 75% HP)
 * Prong appears as a girl and is pink, with noticeable eyelashes.
 * Prong will spawn in one of four pits filled with water in the corners of the room, gasping for air. Afterwards, she will wave her flippers towards the player and dive back into the water. This animation may be delayed until a short period after the room is entered.
 * Prong will whistle, which will cause a shy fly to spawn.
 * Prong will poke her right eye with her right flipper and her tusk will glow, causing a bomb ice hazard to appear above the player, that falls shortly. When it explodes, and snow above pits will be destroyed.
 * Prong will surface balancing an ice hazard on her tusk, which will then fall off.
 * Prong will blow wind at a pit. If the player is caught in the wind, they will be frozen and pushed into the pit. Falling into the pit deals damage.
 * Prong will break 2 segments of the arena, leaving only a line of 3 segments to move on. When she falls, any snow above pits will be destroyed.
 * Keeps most attacks from previous phases.
 * Prong will slowly move while blowing wind at a pit.
 * Prong will break 1 segment of the arena, leaving only a line of 2 segments to move on. When she falls, any snow above pits will be destroyed.
 * Acts the same as phase 2.

Trivia

 * Prong is a narwhal.
 * Prong is one of the few enemies to leave a corpse, the others being The Lamb, Chuck and Catastrophe.
 * Prong's glowing tusk references that in the past narwhal tusks were sold as unicorn horns, a mythical horn thought to have magic powers.
 * Champion Prong is referred to in the files as Prongerina.
 * Despite most female narwhals not having a tusk and those that do generally having smaller tusks, Prongerina and Prong's tusks are the same size.