: Battle cry, indesructible, haste

+1: Discard a card, then draw a card. When you discard a Mountain this way, Koth, Siege Breaker deals 2 damage to target player.

0: Koth, Siege Breaker becomes a creature with power and toughness each equal to the number of Mountains you control until end of turn.

-7: Mountains you control becomes 2/2 red Elemental creatures with battle cry, indestructible and haste. They are still lands.