Dagger of the Worthy

Artifact — Equipment

Equipped creature gets +2/+0 and has afflict 1. (Whenever it becomes blocked, defending player loses 1 life.)
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Damping Sphere

Artifact

If a land is tapped for two or more mana, it produces instead of any other type and amount.
Each spell a player casts costs more to cast for each other spell that player has cast this turn.

Darksteel Brute

Artifact

Indestructible (Damage and effects that say "destroy" don't destroy this artifact.)
: Darksteel Brute becomes a 2/2 Beast artifact creature until end of turn.

Darksteel Garrison

Artifact — Fortification

Fortified land has indestructible.
Whenever fortified land becomes tapped, target creature gets +1/+1 until end of turn.
Fortify (: Attach to target land you control. Fortify only as a sorcery. This card enters the battlefield unattached and stays on the battlefield if the land leaves.)

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.

Deserter's Quarters

Artifact

You may choose not to untap Deserter's Quarters during your untap step.
, : Tap target creature. It doesn't untap during its controller's untap step for as long as Deserter's Quarters remains tapped.

Despondent Killbot

Artifact Creature — Killbot (2/1)

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.

Disruptor Flute

Artifact

Flash
As Disruptor Flute enters the battlefield, choose a card name.
Spells with the chosen name cost more to cast.
Activated abilities of sources with the chosen name can't be activated unless they're mana abilities.

Distorting Lens

Artifact

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

Dolmen Gate

Artifact

Prevent all combat damage that would be dealt to attacking creatures you control.

Dragon's Claw

Artifact

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

Dream Chisel

Artifact

Face-down creature spells you cast cost less to cast.

Dream-Thief's Bandana

Artifact — Equipment

Whenever equipped creature deals combat damage to a player, look at the top card of their library, then exile it face down. For as long as it remains exiled, you may play it, and mana of any type can be spent to cast that spell.
Equip

Dredging Claw

Artifact — Equipment

Equipped creature gets +1/+0 and has menace. (It can't be blocked except by two or more creatures.)
Whenever a creature enters the battlefield from your graveyard, you may attach Dredging Claw to it.
Equip (: Attach to target creature you control. Equip only as a sorcery.)

Dune Mover

Artifact Creature — Phyrexian Golem (2/1)

Toxic 1 (Players dealt combat damage by this creature also get a poison counter.)
When Dune Mover enters the battlefield, you may search your library for a basic land card, reveal it, then shuffle and put that card on top.

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.)