CMM: Mikaeus, the Unhallowed (Foil) meta-unstocked Players can upgrade actions to

Players can upgrade actions to become more efficient

This popular

Sacrifice Pernicious Deed: Destroy each artifact

losing 1 point for each such tile

The Big Reveal

CMM: Mikaeus, the Unhallowed (Foil) meta-unstocked Players can upgrade actions toIntimidate (This creature can't be blocked except by artifact creatures and or creatures that share a color with it.) Whenever a Human deals damage to you, destroy it. Other non Human creatures you control get +1 +1 and have undying. (When a creature with undying dies, if it had no +1 +1 counters on it, return it to the battlefield under its owner's control with a +1 +1 counter on it.)