Brutal Suppression

Activated abilities of nontoken Rebels cost an additional "Sacrifice a land" to activate.

Citadel of Pain

At the beginning of each player's end step, this enchantment deals X damage to that player, where X is the number of untapped lands they control.

Devastate

Destroy target land. Devastate deals 1 damage to each creature and each player.

Fault Riders

Sacrifice a land: This creature gets +2/+0 and gains first strike until end of turn. Activate only once each turn.

Fickle Efreet

Whenever this creature attacks or blocks, flip a coin at end of combat. If you lose the flip, an opponent gains control of this creature.

Flowering Field

Enchant land
Enchanted land has "{T}: Prevent the next 1 damage that would be dealt to any target this turn."

Flameshot

You may discard a Mountain card rather than pay this spell's mana cost.
Flameshot deals 3 damage divided as you choose among one, two, or three target creatures.

Inflame

Inflame deals 2 damage to each creature dealt damage this turn.

Keldon Arsonist

{1}, Sacrifice two lands: Destroy target land.

Keldon Berserker

Whenever this creature attacks, if you control no untapped lands, it gets +3/+0 until end of turn.

Keldon Firebombers

When this creature enters, each player sacrifices all lands they control except for three.

Latulla, Keldon Overseer

{X}{R}, {T}, Discard two cards: Latulla deals X damage to any target.

Latulla's Orders

Flash
Enchant creature
Whenever enchanted creature deals combat damage to defending player, you may destroy target artifact that player controls.

Lesser Gargadon

Whenever this creature attacks or blocks, sacrifice a land.

Panic Attack

Up to three target creatures can't block this turn.

Rhystic Lightning

Rhystic Lightning deals 4 damage to any target unless that permanent's controller or that player pays {2}. If they do, Rhystic Lightning deals 2 damage to the permanent or player.

Prophecy