Selena, Pyro-mage of Carthan

When Selena, Pyro-mage of Carthan enters
the battlefield, you may put a mountain from your hand to the battlefield or deal 2 damage
to any target
Whenever Selena, Pyro-mage of Carthan attacks, it does 1 damage to any target per number of mountains on the battlefield,
{1}{r}, {t}: Deal 4 damage to any target