The Waverance

When The Waverance enters the battlefield,
choose up to two target players (you can be one of
those players).
Target players have hexproof, indestructible, and
can't gain life. (They can't be the target of spells or abilities your opponents control, and they don't lose the
game for having 0 or less life)
When one of the targeted players attacks with a creature or creature token, sacrifice
The Waverance.