Joostmod/Grand Cactus Worm

The Grand Cactus Worm is a Post Skeletron giant worm boss. It spawns after picking up the Extra Succulent Cactus dropped by the.

Behavior
The Grand Cactus Worm's movements synchronize with the battle music, assuming that the game is never paused during the fight.

When the boss first spawns, it charges downward, goes right, then up. It tracks the player with its head above them while spawning bouncing cactus thorns from its body and shooting cactus balls from its mouth. After a few seconds, the worm charges straight down and repeats the same segment, except from below the player. It then charges directly at the player multiple times, followed by shooting a couple cactus balls.

The cycle then repeats, as does the music.

Trivia

 * The music that plays during the boss fight is from Metroid: Zero Mission. It plays during the Deorem fight, which is a giant worm the Grand Cactus Worm is based off of.