Lion's Eye Diamond

Sacrifice Lion's Eye Diamond, Discard your hand: Add three mana of any one color to your mana pool. Play this ability as a mana source.

Narcomoeba

Flying When Narcomoeba is put into your graveyard from your library, you may put it onto the battlefield.

Bridge from Below

Whenever a nontoken creature is put into your graveyard from the battlefield, if Bridge from Below is in your graveyard, put a 2/2 black Zombie creature token onto the battlefield. When a creature is put into an opponent's graveyard from the battlefield, if Bridge from Below is in your graveyard, exile Bridge from Below.

Street Wraith

Swampwalk Cycling—Pay 2 life. (Pay 2 life, Discard this card: Draw a card.)

Cephalid Coliseum

{T}: Add {U} to your mana pool. Cephalid Coliseum deals 1 damage to you. Threshold - {U}, {T}, Sacrifice Cephalid Coliseum: Target player draws three cards, then discards three cards from his or her hand. (Play this ability only if seven or more cards are in your graveyard.)

Careful Study

Draw two cards, then discard two cards from your hand.

Cabal Therapy

Name a nonland card. Target player reveals his or her hand and discards all cards with that name. Flashback-Sacrifice a creature. (You may play this card from your graveyard for its flashback cost. Then remove it from the game.)

Golgari Thug

When Golgari Thug is put into a graveyard from play, put target creature card in your graveyard on top of your library. Dredge 4 (If you would draw a card, instead you may put exactly 4 cards from the top of your library into your graveyard. If you do, return this card from your graveyard to your hand. Otherwise, draw a card.)

Golgari Grave-Troll

Golgari Grave-Troll comes into play with a +1/+1 counter on it for each creature card in your graveyard. {1}, Remove a +1/+1 counter from Golgari Grave-Troll: Regenerate Golgari Grave-Troll. Dredge 6

Stinkweed Imp

Flying Whenever Stinkweed Imp deals combat damage to a creature, destroy that creature. Dredge 5 (If you would draw a card, instead you may put exactly five cards from the top of your library into your graveyard. If you do, return this card from your graveyard to your hand. Otherwise, draw a card.)

City of Brass

Whenever City of Brass becomes tapped, it deals 1 damage to you. {T}: Add one mana of a color of your choice to your mana pool.

Breakthrough

Draw four cards, then choose X cards in your hand and discard the rest from it.

Ichorid

Haste At end of turn, sacrifice Ichorid. At the beginning of your upkeep, if Ichorid is in your graveyard, you may remove a black creature card in your graveyard other than Ichorid from the game. If you do, return Ichorid to play.

Putrid Imp

Discard a card from your hand: Putrid Imp gains flying until end of turn. Threshold - Putrid Imp gets +1/+1 and can't block. (You have threshold as long as seven or more cards are in your graveyard.)

Gemstone Mine

When Gemstone Mine comes into play, put three mining counters on it. {T}, Remove a mining counter from Gemstone Mine: Add one mana of any color to your mana pool. If there are no mining counters on Gemstone Mine, bury it.

Faithless Looting

Mana Confluence