Hand of the Council

Infiltrate (At the beginning of your combat step, you may tap this creature. If you do, another target creature with power lower than this creature without a +1/+1 counter is unblockable until the end of turn.
Put a +1/+1 counter on it.)
{1}, Remove a +1/+1 counter from target creature: Exile that creature, then return it to the battlefield under its owner's control.
An order of mages devoted to the Council of the Pinnacle, they renounce their flesh for a higher, darker purpose.