Darkeater Midir

When you cast this spell, target opponent exiles the
top half of their library, rounded up.

Ward—Sacrifice two permanents.

Darkeater Midir enters with a number of
+1/+1 counters on it equal to the greatest mana
value among cards in exile.

Midir has annihilator X, where X is the number
of +1/+1 counters on it.