The Witness

0: Exile target creature with power 5 or less. Then, add X loyalty to The Witness, where X is that creature's converted mana cost.
-2: Choose a creature from your graveyard. Exile target creature an opponent controls, then replace it with your chosen creature.
0: Each player chooses a creature or planeswalker they control. Exile the rest, then add that many loyalty counters to The Witness.