Gods' Eye, Gate to the Reikai

{T}: Add {1} to your mana pool. When Gods' Eye, Gate to the Reikai is put into a graveyard from play, put a 1/1 colorless Spirit creature token into play.

City of Traitors

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

Trinisphere

As long as Trinisphere is untapped, each spell that would cost less than three mana to cast costs three mana to cast. (Additional mana in the cost may be paid with any color of mana or colorless mana. For example, a spell that would cost {1}{B} to cast costs {2}{B} to cast instead.)

Buried Ruin

{T}: Add {1} to your mana pool. {2}, {T}, Sacrifice Buried Ruin: Return target artifact card from your graveyard to your hand.

Phyrexian Revoker

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

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.

Bottled Cloister

At the beginning of each opponent's upkeep, remove your hand from the game face down. At the beginning of your upkeep, return all cards removed from the game with Bottled Cloister to your hand, then draw a card.

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.

Gemstone Caverns

If Gemstone Caverns is in your opening hand and you're not playing first, you may begin the game with Gemstone Caverns in play with a luck counter on it. If you do, remove a card in your hand from the game. {T}: Add {1} to your mana pool. If Gemstone Caverns has a luck counter on it, instead add one mana of any color to your mana pool.

Metalworker

{T}: Reveal any number of artifact cards in your hand. Add two colorless mana to your mana pool for each card revealed this way.

Defense Grid

During each player's turn, spells played by another player cost an additional {3}.

Grim Monolith

Grim Monolith does not untap during your untap phase. {4}: Untap Grim Monolith. {T}: Add three colorless mana to your mana pool. Play this ability as a mana source.

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.

Mindbreak Trap

If an opponent cast three or more spells this turn, you may pay {0} rather than pay Mindbreak Trap's mana cost. Exile any number of target spells.

Ghost Quarter

Ancient Tomb

Wasteland

Ghirapur Orrery

Inventors' Fair

Grafdigger's Cage

Creature cards in graveyards and libraries can't enter the battlefield. Players can't cast spells from graveyards or libraries.