Tremor

Tremor deals 1 damage to each creature without flying.

Sluggishness

Enchant creature
Enchanted creature can’t block.
When Sluggishness is put into a graveyard from the battlefield, return Sluggishness to its owner’s hand.

Thran War Machine

Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
Thran War Machine attacks each combat if able.

Simian Grunts

Flash
Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)

Radiant’s Dragoons

Echo (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.)
When Radiant’s Dragoons enters, you gain 5 life.

Impending Disaster

At the beginning of your upkeep, if there are seven or more lands on the battlefield, sacrifice Impending Disaster and destroy all lands.

Oppression

Whenever a player casts a spell, that player discards a card.

Windfall

Each player discards their hand, then draws cards equal to the greatest number of cards a player discarded this way.

Viashino Sandswimmer

: Flip a coin. If you win the flip, return Viashino Sandswimmer to its owner’s hand. If you lose the flip, sacrifice Viashino Sandswimmer.

Flesh Reaver

Whenever Flesh Reaver deals damage to a creature or opponent, Flesh Reaver deals that much damage to you.

Befoul

Destroy target land or nonblack creature. It can’t be regenerated.

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.

Greater Good

Sacrifice a creature: Draw cards equal to the sacrificed creature’s power, then discard three cards.

Phyrexian Ghoul

Sacrifice a creature: Phyrexian Ghoul gets +2/+2 until end of turn.

Force of Nature

Trample (This creature can deal excess combat damage to the player or planeswalker it’s attacking.)
At the beginning of your upkeep, Force of Nature deals 8 damage to you unless you pay .

Survival of the Fittest

, Discard a creature card: Search your library for a creature card, reveal that card, put it into your hand, then shuffle.