msem-instigator

Whenever Failed Martyr attacks, each other attacking creature gets +1/+0 until end of turn.
Attain {4}{W} ({4}{W}: Transform this. Spend at least three colors of mana to activate this, and only as a sorcery.)

As an additional cost to cast this spell, sacrifice a creature.
Faith Burns Brightest deals damage equal to the sacrificed creature's power to any target.
Acquiesce (If you cast this spell from your hand, exile it as it resolves. When one or more creatures you control deal combat damage to an opponent, you may cast this card from exile without paying its mana cost.)

Whenever you gain life, put a +1/+1 counter on Faithful Acolyte.
Faithful Acolyte has lifelink as long as it has four or more +1/+1 counters on it.

Vigilance
Whenever you gain life, put a +1/+1 counter on Faithful Priest.

When Faithless Deserter enters, you may sacrifice a creature. If you do, each opponent sacrifices a creature.

Flying
Civilized — Whenever Fakadeh's Anointed deals combat damage to an opponent, if you control an artifact, a creature, and an enchantment, you may return target permanent card with mana value 3 or less from your graveyard to your hand.

All creatures get -2/-2 until end of turn.
Metamorph {1}{B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up and cast it at any time for its metamorph cost.)

At the beginning of combat on your turn, gain control of target creature an opponent controls with power less than the greatest power among creatures you control until end of turn. Untap that creature. It gains haste until end of turn.

Whenever a creature dies, create a 1/1 red and green Warrior creature token if this is the first time this ability has resolved this turn. Otherwise, you draw a card and you lose 1 life.

Fall of the Axe deals 3 damage to any target.

This spell costs {1} less to cast for each permanent sacrificed this turn.
Destroy target noncreature permanent.

When Fallen Dynasty Jailer enters, target opponent exiles a card from their hand. When Fallen Dynasty Jailer is no longer on the battlefield, the exiled card's owner puts it on the top or bottom of their library.

{U}, Discard a card: Counter target spell unless its controller pays {1}.
Whenever a spell or ability you control counters a spell or ability, you get a glory counter. (You lose glory counters before life. A player with ten or more glory counters wins the game.)

{3}{G}: Fallen Forest Wolf gets +2/+2 and gains trample until end of turn. Activate only once each turn.

Enchant creature
Enchanted creature has flying and “Sacrifice a creature: This creature gets +2/+1 until end of turn.”
When Fallen Ideal is put into a graveyard from the battlefield, return Fallen Ideal to its owner's hand.

This spell costs {1} less to cast for each permanent sacrificed this turn.
Fallen Sluagh can't be blocked by creatures with power 2 or less.

Trample
Fallen Warden's power and toughness are each equal to the number of creature cards in all graveyards.

When False-Cure Smuggler enters, put a -1/-1 counter on another target creature.
{1}{U}, Sacrifice a creature: Proliferate. (Choose any number of permanents and/or players with counters on them, then give each another counter of each kind already there.)

As an additional cost to cast this spell, return a creature you control to its owner's hand.
Counter target spell.

Each player returns up to one creature card from their graveyard to their hand. Each opponent sacrifices a creature.

When Fang of Andazir enters, each player sacrifices a permanent.
Whenever you sacrifice a creature for the first time each turn, create a 1/1 red Dog creature token.

Poisonous 2 (Whenever this creature deals combat damage to a player, that player gets two poison counters.)
Snakes you control get +1/+1 and have poisonous 1. (Multiple instances of poisonous trigger separately.)

Target opponent discards a card. If they can't, draw a card. (Then exile this card. You may cast the creature later from exile.)

Flying
Other creatures you control with flying get +1/+1.

First strike
When Faradia's Collector enters, if an opponent controls more lands than you, create a colorless artifact token named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.”