Mt. Hakai, Roil's Ultimate

Trample, Deathtouch
When Mt. Hakai, Roil's Ultimate enters the battleifeld, you may have it enter the battlefield as a legendary Swamp Mountain instead. If you do, Mt. Hakai, Roil's Ultimate has "When this card is tapped for mana, it deals 1 damage to target creature and its controller discards a card unless he or she pays one life."
{1}{b}{r}, {t}: Mt. Hakai deals two damage to you, destroy target land or artifact. Activate this ability only if Mt. Hakai is a creature.