This might be Zens essence mode, might add a bit more spice to it.

Zen is a Delthul and Valkyrie hybrid, so his Delthul blood made his essence, and his Valkyrie blood made his body. Since his essence is primarily Delthul based, him channeling his essence mode results in physical changes that makes him appear more Delthul like (no hands, or feet, multiple arms, no mouth, 6 eyes)

He actually can’t use his wings in his essence mode (wings get too deformed,) but can still fly with his gravity essence via levitation.