msem-instigator

Flash
If an opponent would draw one or more cards except during their draw step, instead they draw a card and you create that many 1/1 white Bird creature tokens with flying.

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.

Whenever a spell or ability causes an opponent to draw a card, draw a card unless that player pays 1 life.

Choose one or all —
• Dreamfire deals X damage to target creature.
• Dreamfire deals X damage to each player.
• Target creature gets +X/+0 until end of turn.

Face-down creatures you control get +1/+1 and have flying.

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

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

Each player mills five cards.
Coalesce {4}{U}{B} (You may cast this from your graveyard for {4}{U}{B}. If you do, it enters as a Horror creature after it resolves. Exile it if it would leave the battlefield or not resolve.)
Drink Thoughts Like Oil can't be blocked.

First strike
{4}{W}, {T}: Target creature gets +2/+1 and gains first strike until end of turn. Activate only as a sorcery.

As Drop of Envy enters, choose a nonland permanent card name.
All cards not on the battlefield, spells, and permanents with the chosen name are legendary.

This spell can't be countered.
Tap up to three target permanents.
Coalesce {9}{U}{U} (You may cast this from your graveyard for {9}{U}{U}. If you do, it enters as a Horror creature after it resolves. Exile it if it would leave the battlefield or not resolve.)
Opponents can't untap more than two permanents during their untap steps while Drown Amidst the Cosmos is on the battlefield.

Target player reveals their hand. You choose a nonland card from it. That player discards that card, then mills four cards.

Prevent all combat damage that would be dealt to you this turn. Populate. (Create a token that's a copy of a creature token you control.)

Defender
When Drunau Egg enters, target player mills two cards.
{3}{U}{U}: Transform Drunau Egg. Activate only as a sorcery and only if an opponent has thirteen or more cards in their graveyard.

{T}: Untap target basic land.

Enchant creature
Enchanted creature has +2/+0 and has haste.
Quickdraw {R} (When a creature you control blocks or becomes blocked, you may cast this spell for {R}.)

When Dualglaive Acolyte enters, create a green Aura enchantment token named Calamighty attached to target creature. The token has enchant creature and “Enchanted creature gets +1/+1 and can't be blocked by creatures with power 2 or less.”

Equipped creature is a Dragon and has base power and toughness 4/4, flying, and “{2}: This creature gets +1/+0 until end of turn.”
Equip {3}

Double strike
{3}{R}{W}: Create Hao'Tai's Blessing, a legendary red and white Aura enchantment token with enchant creature and “Enchanted creature gets +3/+3 and has flying” and attach it to Duan, the Fabled Rider.

When Duchess Odelia VII enters, search your library for a nonland permanent card with mana value 1 or less, reveal it, put it into your hand, then shuffle.

Destroy target creature that dealt damage to a creature you control this turn.

Target creature gets -3/-3 until end of turn.

If an opponent controls more lands than you, search your library for up to three basic land cards, reveal them, put them into your hand, then shuffle.