Mountain

Vampire Hexmage

First strike
Sacrifice Vampire Hexmage: Remove all counters from target permanent.

Dragonskull Summit enters tapped unless you control a Swamp or a Mountain.
{T}: Add {B} or {R}.

At the beginning of each player's draw step, if Howling Mine is untapped, that player draws an additional card.

Blightning deals 3 damage to target player or planeswalker. That player or that planeswalker's controller discards two cards.

Target opponent reveals their hand. You choose a noncreature, nonland card from it. That player discards that card.

{T}: Add {C}.
{T}: Add {B} or {R}. Sulfurous Springs deals 1 damage to you.

Lightning Bolt deals 3 damage to any target.

Whenever an opponent draws a card, Underworld Dreams deals 1 damage to that player.

Earthquake deals X damage to each creature without flying and each player.

Target creature gets -2/-2 until end of turn.

Each player draws three cards, then discards three cards at random.

Whenever an opponent discards a card, Megrim deals 2 damage to that player.

Blackcleave Cliffs enters tapped unless you control two or fewer other lands.
{T}: Add {B} or {R}.

{T}, Sacrifice Terramorphic Expanse: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Pyroclasm deals 2 damage to each creature.

Flying
Whenever Hypnotic Specter deals damage to an opponent, that player discards a card at random.