Vexor, Relentless Biomancer

Hexproof
When Vexor enters the battlefield search
your library for a creature card and exile it.
{2}{u}{g}: Exile a creature you control.
{8}{u}{g}: Create an X/X multicolored mutant creature token that has the abilities and text
of all cards exiled by Vexor. X is the total
power of creatures exiled by Vexor.