Toxic Deluge

As an additional cost to cast Toxic Deluge, pay X life. All creatures get -X/-X until end of turn.

Coercive Portal

Will of the council — At the beginning of your upkeep, starting with you, each player votes for carnage or homage. If carnage gets more votes, sacrifice Coercive Portal and destroy all nonland permanents. If homage gets more votes or the vote is tied, draw a card.

City of Traitors

If you play any land, sacrifice City of Traitors. {T}: Add two colorless mana to your mana pool.

The Abyss

All players bury one target non-artifact creature under their control, if they have any, during their upkeep.

Inkmoth Nexus

{T}: Add {1} to your mana pool. {1}: Inkmoth Nexus becomes a 1/1 Blinkmoth artifact creature with flying and infect until end of turn. It's still a land. (It deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Phyrexian Revoker

As Phyrexian Revoker enters the battlefield, name a nonland card. Activated abilities of sources with the chosen name can't be activated.

Spine of Ish Sah

When Spine of Ish Sah enters the battlefield, destroy target permanent. When Spine of Ish Sah is put into a graveyard from the battlefield, return Spine of Ish Sah to its owner's hand.

Arcbound Ravager

Sacrifice an artifact: Put a +1/+1 counter on Arcbound Ravager. Modular 1 (This enters the battlefield with a +1/+1 counter on it. When it dies, you may put its +1/+1 counters on target artifact creature.)

Vault of Whispers

(Vault of Whispers isn't a spell.) {T}: Add {B} to your mana pool.

Umezawa's Jitte

Whenever equipped creature deals combat damage, put two charge counters on Umezawa's Jitte. Remove a charge counter from Umezawa's Jitte: Choose one — Equipped creature gets +2/+2 until end of turn; or target creature gets -1/-1 until end of turn; or you gain 2 life. Equip {2}

Karakas

{T}: Add {W} to your mana pool. {T}: Return target legendary creature to its owner's hand.

Mox Opal

Metalcraft — {T}: Add one mana of any color to your mana pool. Activate this ability only if you control three or more artifacts.

Mox Diamond

When Mox Diamond comes into play, choose and discard a land card or sacrifice Mox Diamond. {T}: Add one mana of any color to your mana pool. Play this ability as a mana source.

Diabolic Edict

Target player sacrifices a creature.

Crucible of Worlds

You may play land cards from your graveyard.

Lodestone Golem

Nonartifact spells cost {1} more to cast.

Warping Wail

Ancient Tomb

Wasteland

Scrap Trawler

Walking Ballista

Leyline of the Void

If Leyline of the Void is in your opening hand, you may begin the game with it on the battlefield. If a card would be put into an opponent's graveyard from anywhere, exile it instead.

Steel Overseer

{T}: Put a +1/+1 counter on each artifact creature you control.

Sorcerous Spyglass

As Sorcerous Spyglass enters the battlefield, look at an opponent's hand, then choose any card name. Activated abilities of sources with the chosen name can't be activated unless they're mana abilities.

Swamp

({T}: Add {B}.)