City of Traitors

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

Sphere of Resistance

All spells cost an additional {1} to play.

Zuran Orb

{0}: Sacrifice a land to gain 2 life.

Rishadan Port

{T}: Add one colorless mana to your mana pool. {1}, {T}: Tap target land.

Chalice of the Void

Chalice of the Void enters the battlefield with X charge counters on it. Whenever a player casts a spell with converted mana cost equal to the number of charge counters on Chalice of the Void, counter that spell.

Tangle Wire

Fading 4 (This artifact comes into play with four fade counters on it. At the beginning of your upkeep, remove a fade counter from it. If you can't, sacrifice it.) At the beginning of each player's upkeep, that player taps an artifact, creature, or land he or she controls for each fade counter on Tangle Wire.

Mutavault

{T}: Add {1} to your mana pool. {1}: Mutavault becomes a 2/2 creature with all creature types until end of turn. It's still a land.

Mishra's Factory

{T}: Add one colorless mana to your mana pool. {1}: Mishra's Factory becomes an Assembly Worker, a 2/2 artifact creature, until end of turn. Assembly Worker still counts as a land but cannot be tapped for mana the turn it comes into play. {T}: Target Assembly Worker gets +1/+1 until end of turn.

Ratchet Bomb

{T}: Put a charge counter on Ratchet Bomb. {T}, Sacrifice Ratchet Bomb: Destroy each nonland permanent with converted mana cost equal to the number of charge counters on Ratchet Bomb.

Ensnaring Bridge

Each creature with power greater than the number of cards in your hand cannot attack.

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.

Crucible of Worlds

You may play land cards from your graveyard.

Smokestack

During your upkeep, you may put a soot counter on Smokestack. During each player's upkeep, that player sacrifices a permanent for each soot counter on Smokestack.

Lodestone Golem

Nonartifact spells cost {1} more to cast.

Ancient Tomb

Wasteland

Drownyard Temple

Inventors' Fair

Dunes of the Dead