Teriag, Kiras Fire Titan

When enters the battlefield, sacrifice a creature.
If you do, put X +1/+1 counters on Teriag, Doombringer of Worlds, where X is sacrificed creatures converted mana cost.
{3}{r}{t} Sacrifice target creature: put X +1/+1 counters on Teriag, Doombringer of
Worlds, where X is sacrificed creatures converted
mana cost. Teriag, Doombringer of Worlds gains hexproof until end of turn.