Pestilence

At the beginning of the end step, if no creatures are on the battlefield, sacrifice Pestilence.
: Pestilence deals 1 damage to each creature and each player.

Ifh-Bíff Efreet

Flying
: Ifh-Bíff Efreet deals 1 damage to each creature with flying and each player. Any player may activate this ability.

Colossus of Sardia

Trample (This creature can deal excess combat damage to the player or planeswalker it’s attacking.)
Colossus of Sardia doesn’t untap during your untap step.
: Untap Colossus of Sardia. Activate this ability only during your upkeep.

Fog

Prevent all combat damage that would be dealt this turn.

Smoke

Players can’t untap more than one creature during their untap steps.

Crumble

Destroy target artifact. It can’t be regenerated. That artifact’s controller gains life equal to its converted mana cost.

Bottle of Suleiman

, Sacrifice Bottle of Suleiman: Flip a coin. If you win the flip, create a 5/5 colorless Djinn artifact creature token with flying. If you lose the flip, Bottle of Suleiman deals 5 damage to you.

Demonic Hordes

: Destroy target land.
At the beginning of your upkeep, unless you pay , tap Demonic Hordes and sacrifice a land of an opponent’s choice.

Basalt Monolith

Basalt Monolith doesn’t untap during your untap step.
: Add .
: Untap Basalt Monolith.

Living Lands

All Forests are 1/1 creatures that are still lands.

Conversion

At the beginning of your upkeep, sacrifice Conversion unless you pay .
All Mountains are Plains.

Alchor’s Tomb

, : Target permanent you control becomes the color of your choice. (This effect lasts indefinitely.)

Word of Command

Look at target opponent’s hand and choose a card from it. You control that player until Word of Command finishes resolving. The player plays that card if able. While doing so, the player can activate mana abilities only if they’re from lands that player controls and only if mana they produce is spent to activate other mana abilities of lands the player controls and/or to play that card. If the chosen card is cast as a spell, you control the player while that spell is resolving.

Atog

Sacrifice an artifact: Atog gets +2/+2 until end of turn.

Land Equilibrium

If an opponent who controls at least as many lands as you do would put a land onto the battlefield, that player instead puts that land onto the battlefield then sacrifices a land.

Boris Devilboon

, : Create a 1/1 black and red Demon creature token named Minor Demon.