Flying
When Daybreak Rider enters, you may bless another target creature.

Whenever another artifact you control enters, Dazzling Illuminator can't be blocked this turn.

{6}, {T}, Sacrifice Deafening Loudspeaker: It deals 5 damage to target creature. This ability costs {1} less to activate for each attacking creature you control.

When Deathcap Guardian enters, exile any number of permanent cards from your graveyard. When you do, put X +1/+1 counters on Deathcap Guardian and up to one target creature gets -X/-X until end of turn, where X is the number of cards exiled this way.

Deathtouch
{1}, {T}: Create a Treasure token.

Indulgence
Whenever you indulge, put a +1/+1 counter on target creature you control.

Ward {2}
At the beginning of your upkeep, put a +1/+1 counter on Decavolt Reactor.

You may cast this spell as though it had flash by sacrificing a creature in addition to its other costs. If you do, when it enters, attach it to target creature you control.
Equipped creature gets +2/+0 and has “Whenever this creature deals combat damage to a player, that player discards a card.”
Equip—Pay 2 life.

Equipped creature gets +2/+0.
Whenever equipped creature attacks, make a pledge.
Equip {3}

Ward {1}
Decorated Duelist enters with your choice of two different counters on it from among lifelink, vigilance, and first strike.

Vigilance
Creatures you control with vigilance have “{T}: Add {G}.”

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.

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.

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.

Enchant creature
Enchanted creature gets -4/-0 and loses flying.

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.

When Diago Maldovo enters, you may search your library for a card named Marie Laurent or Hans Nehmann and reveal that card. If you do, shuffle, then put the card on top of it.
Legendary Allies you control have trample.

{T}: Add three mana of different colors.

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.

Flying
When Disaffected Seraph enters, you gain X life, where X is the number of creatures with flying you control.