The Figure is believed to be Valcarunos, an infamous Omniar that wanted to take control over the universe, however was sealed inside the Dark Terrain Zeta, as his permanent seal,

while Valcarunos is sealed onto the zeta's Crash site its still hazardous to be in the zeta as the Figure will consume you leaving no traces of your existence.

the only way to not get attacked by The Figure is by exploring the insides with a voidian

words of advice: when the lights flicker... run