Caldera Hellion
{3}{R}{R}
Creature -- Hellion
3/3
Devour 1 (As ~this~ enters, you may sacrifice any number of creatures. It enters with that many +1/+1 counters on it.)
When ~this~ enters, it deals 3 damage to each creature.
Lavabrink Floodgates
{3}{R}
Artifact
{T}: Add {R}{R}.
At the beginning of each player's upkeep, that player may put a doom counter on ~this~ or remove a doom counter from it. Then if it has three or more doom counters on it, sacrifice ~this~. When you do, it deals 6 damage to each creature.