Crook of Condemnation

Artifact

, : Exile target card from a graveyard.
, Exile Crook of Condemnation: Exile all graveyards.

Crystal Slipper

Artifact — Equipment

Equipped creature gets +1/+0 and has haste.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Curious Killbot

Artifact Creature — Killbot (2/1)

Dancing Sword

Artifact — Equipment

Equipped creature gets +2/+1.
When equipped creature dies, you may have Dancing Sword become a 2/1 Construct artifact creature with flying and ward . If you do, it isn't an Equipment.
Equip

Darksteel Pendant

Artifact

Indestructible (Effects that say "destroy" don't destroy this artifact.)
, : Scry 1. (Look at the top card of your library. You may put that card on the bottom of your library.)

Defense Grid

Artifact

Each spell costs more to cast except during its controller's turn.

Delighted Killbot

Artifact Creature — Killbot (2/1)

Demon's Horn

Artifact

Whenever a player casts a black spell, you may gain 1 life.

Despondent Killbot

Artifact Creature — Killbot (2/1)

Diamond Lion

Artifact Creature — Cat (2/2)

, Discard your hand, Sacrifice Diamond Lion: Add three mana of any one color. Activate only as an instant.

Diamond Mare

Artifact Creature — Horse (1/3)

As Diamond Mare enters the battlefield, choose a color.
Whenever you cast a spell of the chosen color, you gain 1 life.

Digsite Conservator

Artifact Creature — Gnome (2/1)

Sacrifice Digsite Conservator: Exile up to four target cards from a single graveyard. Activate only as a sorcery.
When Digsite Conservator dies, you may pay . If you do, discover 4. (Exile cards from the top of your library until you exile a nonland card with mana value 4 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)

Dimir Signet

Artifact

, : Add .

Distorting Lens

Artifact

: Target permanent becomes the color of your choice until end of turn.

Doubling Cube

Artifact

, : Double the amount of each type of unspent mana you have.

Dragon's Claw

Artifact

Whenever a player casts a red spell, you may gain 1 life.

Draugr's Helm

Artifact — Equipment

When Draugr's Helm enters the battlefield, you may pay . If you do, create a 2/2 black Zombie Berserker creature token, then attach Draugr's Helm to it.
Equipped creature gets +2/+2 and has menace. (It can't be blocked except by two or more creatures.)
Equip

Eager Construct

Artifact Creature — Construct (2/2)

When Eager Construct enters the battlefield, each player may scry 1. (To scry 1, look at the top card of your library, then you may put that card on the bottom of your library.)

Eater of Virtue

Legendary Artifact — Equipment

Whenever equipped creature dies, exile it.
Equipped creature gets +2/+0.
As long as a card exiled with Eater of Virtue has flying, equipped creature has flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, protection, reach, trample, and vigilance.
Equip

Elaborate Firecannon

Artifact

Elaborate Firecannon doesn't untap during your untap step.
, : Elaborate Firecannon deals 2 damage to any target.
At the beginning of your upkeep, you may discard a card. If you do, untap Elaborate Firecannon.