Surging Volcano

This land enters the battlefield tapped unless you control two or more mountains.
{t} {r}{r}
Hellfire Eruption: Sacrifice this card and deal 2
damage to all creatures
Armageddon:{3}{r}{r} and sacrifice this card to
kill all creatures. All opponents take 5 damage,
you take 10.
(The demons of the underworld pounded on the crust
of the realm, causing great, world ending eruptions.)