Mogg Assassin

{T}: You choose target creature an opponent controls, and that opponent chooses target creature. Flip a coin. If you win the flip, destroy the creature you chose. If you lose the flip, destroy the creature your opponent chose.

The List

Exodus

oc
T: Flip a coin. If you win the flip, destroy target creature an opponent controls. Otherwise, destroy target creature of that opponent's choice.

You and your opponent both pick the target creatures on announcing, which is before the coin is flipped. You pick first.