Manabarbs

Whenever a player taps a land for mana, this enchantment deals 1 damage to that player.

Phyrexian Reclamation

{1}{B}, Pay 2 life: Return target creature card from your graveyard to your hand.

Stranglehold

Your opponents can't search libraries.
If an opponent would begin an extra turn, that player skips that turn instead.

Chainer, Nightmare Adept

Discard a card: You may cast a creature spell from your graveyard this turn. Activate only once each turn.
Whenever a nontoken creature you control enters, if you didn't cast it from your hand, it gains haste until your next turn.

Furious Assault

Whenever you cast a creature spell, this enchantment deals 1 damage to target player or planeswalker.

Frenzied Fugue

Enchant permanent
When this Aura enters and at the beginning of your upkeep, gain control of enchanted permanent until end of turn. Untap that permanent. It gains haste until end of turn.

Rite of the Raging Storm

Creatures named Lightning Rager can't attack you or planeswalkers you control.
At the beginning of each player's upkeep, that player creates a 5/1 red Elemental creature token named Lightning Rager. It has trample, haste, and "At the beginning of the end step, sacrifice this token."

Shivan Harvest

{1}{R}, Sacrifice a creature: Destroy target nonbasic land.

Knollspine Invocation

{X}, Discard a card with mana value X: This enchantment deals X damage to any target.

Furnace Celebration

Whenever you sacrifice another permanent, you may pay {2}. If you do, this enchantment deals 2 damage to any target.

Havoc Festival

Players can't gain life.
At the beginning of each player's upkeep, that player loses half their life, rounded up.

Heat of Battle

Whenever a creature blocks, this enchantment deals 1 damage to that creature's controller.

Burning Sands

Whenever a creature dies, that creature's controller sacrifices a land of their choice.

Lust for War

Enchant creature
Whenever enchanted creature becomes tapped, this Aura deals 3 damage to that creature's controller.
Enchanted creature attacks each combat if able.

Heat Stroke

At end of combat, destroy each creature that blocked or was blocked this turn.

War's Toll

Whenever an opponent taps a land for mana, tap all lands that player controls.
If a creature an opponent controls attacks, all creatures that opponent controls attack if able.

Onslaught

Whenever you cast a creature spell, tap target creature.

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.

Maralen of the Mornsong

Players can't draw cards.
At the beginning of each player's draw step, that player loses 3 life, searches their library for a card, puts it into their hand, then shuffles.

Rhystic Tutor

Unless any player pays {2}, search your library for a card, put that card into your hand, then shuffle.

Price of Glory

Whenever a player taps a land for mana, if it's not that player's turn, destroy that land.

Tectonic Instability

Whenever a land enters, tap all lands its controller controls.

Impatience

At the beginning of each player's end step, if that player didn't cast a spell this turn, this enchantment deals 2 damage to that player.

Aggressive Mining

You can't play lands.
Sacrifice a land: Draw two cards. Activate only once each turn.

Invasion Plans

All creatures block each combat if able.
The attacking player chooses how each creature blocks each combat.

Mana Cache

At the beginning of each player's end step, put a charge counter on this enchantment for each untapped land that player controls.
Remove a charge counter from this enchantment: Add {C}. Any player may activate this ability but only during their turn before the end step.