Kentry, Judge of Dead

Whenever a creature dies you can pay {w/b}{w/b}{w/b} and put back on the battlefield
Whenever a creature enter the battlefield you can pay {w/b}{w/b}{w/b} and destroy that creature.
{x}{w/b}: Target creature gets -X/-X until end of turn.
When a spell or ability wich is not from a Kentry, Judge of Dead source counter that ability.
"Who are youuuu????"
—Kentry during a defiance