Koth, Fire of Resistance (Borderless) (ONE-338) - Phyrexia: All Will Be One: (Showcase)

+2: Search your library for a basic Mountain card, reveal it, put it into your hand, then shuffle.
−3: Koth deals damage to target creature equal to the number of Mountains you control.
−7: You get an emblem with "Whenever a Mountain you control enters, this emblem deals 4 damage to any target."