The problem with having a ball of Magic substance like Xiron just traveling through the Multiverse is that it is exposed to everyone and after some time, someone found a way to extract a part of this substance to create a new creature, a ball of Magic of its own to use it and pursue his own objectives. He’s turned all that Magic into Gelotron, a monster designed to attack!
He’s a tough one to defeat since he’s Immune to Control status effects and has vampiric attacks in which he gains Life by taking it away from his rivals! But Gelotron isn’t just resilient, he’s also terribly dangerous! He can cast random torture effects on his enemies, increasing the chance of dealing even more damage after the hit.