The Boiling Rock

The Boiling Rock enters tapped unless you pay {2}. If this enters untapped, deal 2 damage to
target creature or planeswalker.
{t}: Add {r} to your mana pool.
{2}{r}: Discard a card, then draw a card. If a
non-land card was discarded this way, deal
2 damage to any target. If a land was discarded
this way, add {r}{r}{r} to your mana pool.