The Vindicators

Reach, Wither, Shroud, Indestructible
Whenever another creature dies, put a -1/-1
counter on The Vindicators.
{w}{u}{b}{r}{g}: Exile The Vindicators and return it
to the battlefield tapped at the beginning of the
next end step.
"Rick, the Vindicators only call when the universe
itself is at stake. They're the first line of defense
against evil. They're the guardians of the unguarded!"
—Morty