Deepcavern Scyllia enters with X +1/+1 counters on it.
You may cast Deepcavern Scyllia from your graveyard by paying {3}{G} and exiling X other permanent cards from your graveyard rather than paying its mana cost.

Deeplife Cavern enters tapped unless you control a Forest.
{T}: Add {U} or {B}.

Whenever Deeptreader Arcanist attacks, you may draw a card. If you do, discard a card.

Enchant creature
You control enchanted creature.
Enchanted creature has decayed.

Whenever Defthand Infiltrator deals combat damage to a player, put a +1/+1 counter on it if it doesn't have one on it.
Defthand Infiltrator can't be blocked as long as it has a counter on it.

Flying
{1}, {T}: Draw a card, then discard a card.
Whenever one or more creatures you control deal combat damage to a player, untap Delivery Gull.

When Demographer enters, draw a card, then discard a card. When you discard a nonland card this way, make a pledge.
{2}, {T}: Draw a card, then discard a card. When you discard a nonland card this way, make a pledge.

When Demolition Team enters, teach target creature trample. If you put a +1/+1 counter on it this way, it must be blocked this turn if able.

Depths Ancient's power and toughness are each equal to the number of cards in your graveyard plus the number of exiled cards you own with surface.
Surface {5}{B}{B}

When Desolate Lands enters and whenever you cast a spell, it deals 3 damage to target opponent unless they sacrifice a permanent.

Desolate Soundvein enters tapped.
When Desolate Soundvein enters, you may pay 1 life. If you do, add one mana of any color other than black.
{T}: Add {B}.

Whenever one or more creatures you control deal combat damage to a player, you draw a card unless that player discards a card.
{X}: Creatures with power X or less can't block this turn.

Deathtouch
When you sacrifice Devoted Lackies as a cost to cast a spell or activate an ability that isn't a mana ability, copy that spell or ability. You may choose new targets for the copy.

Dhante's Inferno deals 4 damage to any target. Create a number of tapped Treasure tokens equal to the amount of excess damage dealt this way.
{X}, Exile Dhante's Inferno from your graveyard: Each opponent loses X life and you gain X life. Spend only mana from artifact sources to activate this ability. Activate only as a sorcery.

When Diamond Dust enters and whenever you cast a spell, put a +1/+1 counter on each creature you control.

{T}: Add three mana of different colors.

{2}{U}{U}, Exile Digitize the Analog World from your hand: At the beginning of your next upkeep, you may cast Digitize the Analog World from exile without paying its mana cost. Activate only as a sorcery.
Return all nonartifact, nonland permanents to their owner's hands.

When you cast this spell, you may choose another creature it could target. If you do, copy it. The copy targets that creature.
Enchant creature
Enchanted creature gets +2/+2.

Once each turn, when another artifact you control enters, you may tap or untap target creature.

Whenever Disciple of the Weavers attacks, if you control another creature with power 4 or greater, Disciple of the Weavers can't be blocked by creatures with power 2 or less.
Whenever Disciple of the Weavers deals combat damage to a player, put a +1/+1 counter on it.

Activated abilities of other artifacts and enchantments with mana value 3 or less can't be activated.
{1}, Sacrifice Disestablishmentarianism: Exile target artifact or enchantment.

This spell can't be countered except by spells named Diss Track.
Counter target spell.

Exile target creature. Distribute two +1/+1 counters among up to two target creatures you control.

Target opponent reveals their hand. You choose a nonland card from it and integrate it.

Integrate target creature.