msem-instigator

When Dawson's Warden enters, create a Treasure token.
As long as you control three or more artifacts, Dawson's Warden gets +2/+0 and has first strike.

Lifelink
At the beginning of each player's end step, that player discards each card in their hand, then draws that many cards. When no cards are discarded this way, Dayang, Aspiring Muse deals 2 damage to each opponent.

{2}{G}{U}: Target creature you control voyages. (If it isn't blocking or targeted by another spell or ability, it phases out.)
Whenever a creature you control phases in, draw a card.

Flying, lifelink
When Daystrider Pegasus enters, exile another target non-Pegasus permanent you control, then return it to the battlefield under its owner's control.

Tap two untapped Elves you control: Add {G}{G}.
{6}{G}{G}: Create an 8/8 green Elemental creature token.

Dazzling Duelist has first strike as long as it's attacking.
{2}{R}: Dazzling Duelist gets +2/+0 until end of turn.

Flash (You may cast this spell any time you could cast an instant.)
When Dazzling Voidmage enters, you may return target attacking creature to its owner's hand.

Dead-Set Duo can't block.
Whenever Dead-Set Duo deals combat damage to a player, you may pay {B} and sacrifice it. If you do, they discard two cards.

Primal {R} (During your turn, you may cast this spell for {R} instead of playing a land.)
When Deadeye Drowner enters, it deals 2 damage to any target.

Vigilance
Whenever one or more cards leave your graveyard, surveil 1.

Deathtouch
When Deadwood Terror enters from a graveyard, create two tokens that are copies of it.
{4}{B}{B}, Sacrifice a creature: Return Deadwood Terror from your graveyard to the battlefield. Activate only as a sorcery.

Flying
When Dealer of Pointed Fortunes enters, proliferate. (Choose any number of permanents and/or players with counters on them, then give each another counter of each kind already there.)

Haste
Whenever another creature you control dies, each opponent loses 1 life and you gain 1 life.

Flying, deathtouch

When Deathless Disciple dies, if it's not a token, create a token that's a copy of it, except it has no mana cost.
Revive {6}{B} ({6}{B}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

Creatures you control have menace.

When Debaser of Truth enters, if you control three or more Horrors, each opponent discards two cards.
Other Horror creatures you control get +1/+1.

Whenever Deceitful Soul becomes blocked by one or more creatures, it gets +2/+0 until end of turn.

Flash
When Decisive Arcanist enters, you may cast target modal instant or sorcery card in your graveyard. Exile that card instead of putting it into your graveyard as it resolves.

Haste
When Dedicated Bushwacker enters, other creatures you control get +1/+0 and gain haste until end of turn.

Flash
Cadence (Whenever you cast a spell, if its mana value is greater than this creature's power, put a +1/+1 counter on this creature.)

First strike
Whenever a card leaves your graveyard, you may pay {2}{R}. If you do, this creature deals 2 damage to any target.

Haste
{R}, Sacrifice Deepstone Operative: Destroy target artifact.

When this creature enters, you may sacrifice a creature. If you do, create a 4/4 red Horror creature token with menace.

Spells can't be cast from libraries.
If a nonland permanent would enter from a library, exile it instead.