Nivithos

Opponent(s) must reveal their hand(s).
You choose a non-land creature from one.
That card is sacrificed.
Hexproof ( This creature can't be the target of
spells or abilities your opponents control. )
Haste (This creature can attack and {t} as soon as
it comes under your control.)
{x}{b}{b}{t} Shadow Rend: A powerful strike
dealing X damage to 3 target creatures.