Mountain

Eidolon of Rhetoric

Each player can't cast more than one spell each turn.

Fabled Passage

{T}, Sacrifice this land: Search your library for a basic land card, put it onto the battlefield tapped, then shuffle. Then if you control four or more lands, untap that land.

Swift End

Destroy target creature or planeswalker. You lose 2 life. (Then exile this card. You may cast the creature later from exile.)

Murderous Rider

Lifelink
When this creature dies, put it on the bottom of its owner's library.

Murderous Rider // Swift End

Stormfist Crusader

Menace
At the beginning of your upkeep, each player draws a card and loses 1 life.

Thrill of Possibility

As an additional cost to cast this spell, discard a card.
Draw two cards.

Rule of Law

Fateful Absence

Destroy target creature or planeswalker. Its controller investigates. (Create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")

Fate Unraveler

Whenever an opponent draws a card, this creature deals 1 damage to that player.

Nomad Outpost

This land enters tapped.
{T}: Add {R}, {W}, or {B}.

Plains

Ob Nixilis, the Hate-Twisted

Whenever an opponent draws a card, Ob Nixilis deals 1 damage to that player.
−2: Destroy target creature. Its controller draws two cards.

Mad Ratter

Whenever you draw your second card each turn, create two 1/1 black Rat creature tokens.

Sign in Blood

Target player draws two cards and loses 2 life.

Dragonskull Summit

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

Bedevil

Destroy target artifact, creature, or planeswalker.

Hero's Downfall

Swamp

Isolated Chapel

This land enters tapped unless you control a Plains or a Swamp.
{T}: Add {W} or {B}.

Underworld Dreams

Whenever an opponent draws a card, this enchantment deals 1 damage to that player.