msem-instigator

Flying (This creature can't be blocked except by creatures with flying or reach.)
When Drake Youngling enters, draw a card.

Flying
Ride {3}{U} ({3}{U}: Transform this and attach it to target creature you control without a Steed. Ride only as a sorcery.)

Drakon Nightshade can't block.
When Drakon Nightshade dies, scry 1.

Search your library for a basic land card and put that card onto the battlefield tapped, then shuffle.
Create a Vial token. (It's an artifact with “{1}, Sacrifice this and another permanent: Draw a card. Activate only during your turn.”)

Prowess
At the beginning of combat on your turn, if a permanent you controlled left the battlefield this turn, target creature can't block this turn.

Target creature gets -2/-1 until end of turn. When it dies this turn, its controller loses 5 life.

{1}, Sacrifice another creature: Put a +1/+1 counter on Dread Cabalist and on up to one target legendary creature. Activate only as a sorcery.

When Dread Elk dies, put a +1/+1 counter on target creature you control. If that creature is a Zombie, put two +1/+1 counters on it instead.
Foreshadow {5}{B} (You may cast this spell for its foreshadow cost. If you do, also trigger its “dies” abilities when it enters.)

Put target attacking or blocking creature on the bottom of its owner's library.

Deathtouch
Whenever Dreadful Gorgon attacks, target attacking creature with lesser power gains deathtouch until end of turn.

When this creature enters, you may sacrifice a creature. If you do, you draw a card and you lose 1 life.
Arise {2}{B} ({2}{B}, Exile this from your graveyard as a sorcery: Create a black token copy of it that's also a Zombie and can't block.)

Flying
When Dreadstone Watcher dies, investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)

Menace
Crew 3 (Tap any number of creatures you control with total power 3 or greater: This Vehicle becomes an artifact creature until end of turn.)

When Dream Keeper enters, each player conjures a card named Fatigue and puts it on top of their library. (It's a colorless sorcery that costs {2} with “Draw a card.”)
Whenever a player draws a card except the first one they draw in each of their draw steps, each opponent mills a card.

As an additional cost to cast this spell, discard a card.
Draw two cards. Add one mana of any color.

Dreamchaser Djinni attacks each combat if able.

Choose one —
• Create two 1/1 black Worm creature tokens.
• Put up to two target cards from your graveyard on top or bottom of your library.

{1}{B}, Mill three cards: Return Dredging Aberration from your graveyard to your hand.

When Dregscape Wretch dies, create a 2/2 black Zombie creature token.

Enchant creature
Whenever a creature dealt damage by enchanted creature this turn dies, put a +1/+1 counter on enchanted creature.
When enchanted creature dies, draw a card.

When Drift Tracer enters, search your library for a basic land card that shares a type with a basic land you control and put it onto the battlefield tapped, then shuffle.

When Driftpicker enters, you may return another non-Crab creature you control to its owner's hand. If you do, create two 1/1 white Bird creature tokens with flying.

Creatures you control get +1/+1 until end of turn. Merfolk you control get an additional +1/+1 until end of turn.

Whenever you cast a spell during an opponent's turn, creatures you control get +0/+1 until end of turn.

Gain control of target creature until end of turn. Untap it. It gets +2/+0 and gains haste until end of turn.