msem-instigator

When Affluent Host dies, it deals 1 damage to each opponent. Create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)
Foreshadow {2}{R} (You may cast this spell for its foreshadow cost. If you do, also trigger its “dies” abilities when it enters.)

As long as it's your turn, Ahl the Omenwing is a 2/1 Bird Wizard creature with flying and indestructible. (He doesn't lose loyalty while he's not a planeswalker.)
[+1]: Surveil X, where X is the number of creatures that attacked this turn.
[–2]: Return target nonland permanent to its owner's hand. Draw a card.

Flying, vigilance
Whenever Alabaster Avenger attacks, if it's enchanted or equipped, it gains first strike until end of turn.

Enchant creature you control
Enchanted creature gets +2/+2.
When enchanted creature dies, return Alabaster Halo to the battlefield transformed under your control.

Return up to two target instant and/or sorcery cards from your graveyard to your hand, then you may cast an instant or sorcery card with mana value 2 or less from your hand without paying its mana cost. Exile Alchemical Warfare.

When Alchemist's Grimoire enters, it deals 2 damage to any target.
{1}{R}, {T}, Discard a card: Draw a card.

Create two 1/1 white Human creature tokens.

Choose one —
• Exile target artifact.
• Exile target creature with flying.
• Exile target card in a graveyard.

This spell costs {X} less to cast, where X is the amount of life you've gained this turn.
Flying
When Angel of Sunrise enters, each opponent exiles a Spirit, Vampire, Werewolf, Zombie, or double-faced permanent they control.

Whenever you gain life, draw a card. This ability triggers only once each turn.
{6}: Angelic Statue becomes a 3/3 white Angel creature with flying and lifelink until end of turn.

If this spell was foretold, target player creates a 4/4 red Dragon creature token with flying. Apex's Prey deals damage equal to the greatest power among creatures you control to up to one target creature or planeswalker.
Foretell {1}{R}{R}{G} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

As an additional cost to cast this spell, discard two cards.
Target player draws two cards. Return up to one target creature to its owner's hand.

Flying, lifelink
When Archdemon Shilgengar enters, exile all land cards from your graveyard, exchange your graveyard and library, then shuffle your library.
You can only cast spells by paying life equal to their mana value rather than paying their mana cost.

Flash
Whenever this enchantment enters, draw a card.
Whenever you cast your first spell during each opponent's turn, draw a card.
Foretell {2}{U} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Search your library for a legendary creature card, reveal it, put it into your hand, then shuffle. Then if this spell was foretold, you may put a creature card from your hand onto the battlefield.
Foretell {4}{G}{G}{W} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

When this creature enters, put a -1/-1 counter on a creature you control.
{2}{U}, {T}: For each permanent, you may give it a counter of a kind already there. Then draw a card for each permanent with three or more counters on it.

First strike
Sacrifice this creature: Search your library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Mill three cards. You may return a card milled this way to your hand. Each opponent loses 2 life.
Flashback {3}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Choose one —
• You gain hexproof until end of turn.
• Target creature you control gains double strike until end of turn.
• Exile target card from a graveyard. You gain 4 life.

Lifelink

At the beginning of your end step, if you control two or more artifacts and/or enchantments, transform Avacyn's Partisan.

Flying, vigilance
At the beginning of your end step, return up to one target permanent card from your graveyard to the battlefield with an indestructible counter on it.

Target creature you control deals damage equal to its toughness to another target creature.

Reach
{4}{B}: Each opponent loses 2 life and you gain 2 life.

Put X +1/+1 counters on target creature you control. It deals damage equal to its power to up to one target creature or planeswalker you don't control. If that creature or planeswalker would die this turn, exile it instead.