Koth, Fire of Resistance [Store Championships 2023]

+2: Search your library for a basic Mountain card, reveal it, put it into your hand, then shuffle.

−3: Koth, Fire of Resistance deals damage to target creature equal to the number of Mountains you control.

−7: You get an emblem with “Whenever a Mountain enters the battlefield under your control, this emblem deals 4 damage to any target.”