Kaltain, The Devourer

Flying Hexproof Fear Vigilance Undying
Menace

At the end of your combat phase, destroy all
creatures that attacked or were blocked by
Kaltain, The Devourer this turn.
{1}{b} Tap target creature your opponent
controls. It does not untap unless your
opponent pays 2 life.
{1}{g} Target creature gets -1/-1 until end of
turn. Kaltain, The Devourer gains
Deathtouch.