It is described in the next comment.

"Perfection" a entity that finds and captures imperfections in all dimensions, after a while the creatures fused into... that.

It can destroy any non-living object with ease. every weak living creature will die just by standing around Imperfection. Only super powerful beings can be near this without fading away. This creature is completely immune to any spells or magic used on it, Like curses and even shields. But somehow the only thing that can stop it is Perfection.

Perfection, looks similar to a 2x2 completely blue rubix cube. Any distortions in the universe will be eaten by Perfection, if the imperfections fight back, Perfection knows how to beat them. If anything (perfect or not) attacks Perfection will be destroyed.