msem-instigator

{U}, Sacrifice a creature: Discard a card, then draw a card.

When Drownyard Scavenger enters, each player may return an instant or sorcery card from their graveyard to their hand.

Enchant creature
Enchanted creature doesn't untap during its controller's untap step.

Tap target creature.
Fabled {3}{U} (Then if you cast this for its fabled cost, put it onto the battlefield transformed attached to that creature.)

Counter target spell.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, that spell's controller reveals their hand. You may exile a nonland card from that player's hand. If you do, that player draws a card.

Whenever Duela Alchemist becomes tapped, catalyze. (The next spell you cast this turn costs {1} less to cast.)
{1}{U}, {T}: Untap another target artifact or creature.

Whenever you cast a spell with mana value 4 or greater, catalyze. (The next spell you cast this turn costs {1} less to cast.)

Enchant creature
When Duelist's Wings enters, put two +1/+1 counters on enchanted creature.
Enchanted creature has flying.

When Duncaster Nightwatcher enters and whenever you cast a noncreature spell, create a 1/1 colorless Human creature token.
Whenever you attack with three or more creatures, return target noncreature, nonland card with mana value 3 or less from your graveyard to your hand.

Flash
When Duplicated Dismantler enters, if you cast another spell this turn, return target spell to its owner's hand.

Vanishing 3 (This permanent enters with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
Creatures get -1/-0.
{1}{W}: You gain 1 life for each time counter on Dwindling Peace.

Each player returns each instant and sorcery card from their graveyard to their hand. Exile Ebb and Flow.

Choose two —
• Scry 2. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)
• Draw a card.
• Untap up to one land.

Draw a card.
Reprise {2} (As you cast an instant or sorcery spell, you may exile one card with reprise from your graveyard and pay its reprise cost. If you do, add its effects to that spell.)

Counter target spell and each other spell with the same name as that spell.

Enchant creature
Enchanted creature has “Whenever this creature deals combat damage to a player, create a token that's a copy of it, except it's a 1/1 Reflection” and “When this creature leaves the battlefield, sacrifice all Reflections you control.”

Creatures your opponents control get -1/-0 until end of turn for each different creature type among creatures you control.

Scry 1, then reveal the top card of your library. If it's a land card, put it into your hand.
Draw a card.

If you would draw one or more cards, instead you may draw that many cards plus one, then discard a card.
As long as ten or more cards are in your graveyard, noncreature spells you cast cost {1} less to cast.

Flying
Civilized — Whenever Edifice Overseer attacks, if you control an artifact, a creature, and an enchantment, other attacking creatures you control gain flying until end of turn.

When Edina's Soulsinger enters, create a 1/1 blue Jellyfish enchantment creature token with slipstream. (It can't be blocked as long as only creatures with slipstream are attacking.)

At the beginning of your end step, draw a card for each card you drew this turn.

Put target spell or nonland permanent on top of its owner's library.
Lifecycle {3} ({3}, Discard this card: Create two tapped 1/1 colorless Elemental creature tokens.)

As an instant or sorcery spell not cast from exile resolves, exile it instead of putting it anywhere else.
Once each turn, you may cast a card exiled with Eidetic Memory.