Epic Cell
From SporeWiki, the knowledge base dedicated to Spore
An Epic Cell is a colossal version of a normal cell in the Cell stage, being even bigger than ordinary Predatory cells. Once your cell evolves, Epic Cells will become smaller (in relation to your cell), turning into predatory cells, and later normal cells, making them easy to kill. Like Epic Creatures, they are very hard to kill because only a few strategies exist to even hurt them. They can range from just about the size of your screen to more than four times the size of your screen. These can kill your cell with just one bite.
