Goffnal-It Mountains

Goffnal-It Mountains enters the battlefield
tapped.
{t}: Add {r} to your mana pool.
Tap an Orc or Goblin you control, {t}:
Goffnal-It Mountains deals {x} damage to any target, {x} being the number of Goffnal-It Mountains you control. You can only activate this ability if you were attacked in your last turn.