Exxo Avalon/Bacterium Prime

"At least this BP can't have an oil spill."

Bacterium Prime is a Pre-Hardmode -themed boss in Exxo Avalon. It is summoned with the in the Contagion, or by breaking three s that spawn in the Contagion Rings.

Defeating Bacterium Prime and the s it spawns is the only way to obtain s

Bacterium Prime is the Contagion counterpart to the Corruption's Eater of Worlds and the Crimson's Brain of Cthulhu.

First Phase
Bactus Minions will circle around the boss, while the boss is invunerable. However, the player is still capable of hitting the boss. Every twelve hits on it will spawn an additional minion. Once all of them are defeated, the boss will enter it's second phase.

Second Phase
In the second phase, Bacterium Prime will become vulnerable to damage and it will teleport around and start to slowly charge towards the player in a similar vein as the Brain of Cthulhu.

Trivia

 * Bacterium Prime's theme is Ḍ̵͔I̸̯̩S̶͍̬Ę̵̲A̷̖̖S̷̝̲E̵͕̼Ḏ̸͓ which was made by Turquoise.