msem-instigator

Vigilance, spirited (When this enters, you may activate one of its activated abilities without paying its costs.)
{T}: Choose artifact or enchantment. Target nonland permanent becomes the chosen type in addition to its other types until end of turn.
Civilized — At the beginning of your end step, if you control an artifact, a creature, and an enchantment, put a +1/+1 counter on target creature you control.

Indestructible
As long as your devotion to black is less than five, Erebos isn't a creature.
Other creatures you control dying causes abilities of that creature to trigger as though it entered.
{2}{B}: Each opponent loses 1 life. You gain life equal to the life lost this way.

Artifacts you control have “{T}: Add one mana of any color.”
{2}{R}{G}: Create a 3/2 green Crocodile creature token with trample. It gains haste until end of turn.

Once each turn, when Eruq, the Flamebearer enters or you attack with one or more Horrors, you may have Eruq deal 2 damage to each opponent. Then if Eruq isn't a token, gain control of target creature an opponent controls until end of turn. Tap it. It's attacking its controller.
{2}{R}{R}, Discard Eruq: Create a token that's a copy of Eruq, the Flamebearer, except it's 4/4 and isn't legendary. Activate only as a sorcery.

At the beginning of your upkeep, you may put each card in your graveyard on the bottom of your library in a random order, then mill six cards.
During each of your turns, you may play a land and cast a permanent spell from your graveyard.

Vigilance, ward {1}
{T}: Add one mana of any color. If that mana is spent on a creature spell, it enters with an additional +1/+1 counter on it.

Whenever another creature you control enters, put your choice of a vigilance, reach, or trample counter on this creature.
{T}, Remove a counter from this creature: Add one mana of any color. If that mana is spent on a creature spell, you may have it enter the battlefield with an additional counter of that kind on it.

All damage that would be dealt to you is dealt to Escyf, Fallen Sundancer instead.
Whenever Escyf perseveres, put a +1/+1 counter on it. (A creature perseveres when it survives damage.)

When Esiara, Skycaster's Infiltrator enters, exile target spell with mana value 4 or less.
{1}{U}{U}, Discard two cards: Exile Esiara, then return it to the battlefield under your control.
{2}{U}{U}, {T}, Exile Esiara: Until end of turn, you may play cards you don't own from exile.

Flying, vigilance
Embattled creatures you control have ward {1}. (A creature is embattled if it has a counter on it or a permanent you control attached to it.)
Whenever one or more creatures you control deal combat damage to a player, put a +1/+1 counter on one of those creatures.

At the beginning of your upkeep, return a permanent you control to its owner's hand.
You may play an additional land on each of your turns.

Transcend (Activate as a sorcery to gain the next type and a +1/+1 counter.)
You may play cards exiled with Fahrib and you may spend mana as though it were mana of any color to play them.
{U}{B}: Demon — Each player exiles a card from their hand.
{4}{U}{B}: Elder — Exile the top five cards of each player's library. Fahrib gains “Spells you cast from anywhere other than your hand cost {2} less to cast.”

Flying
Whenever Fakadeh, Florid Queen attacks, you may exile an instant or sorcery card from your graveyard with mana value 3 or less.
Whenever Fakadeh deals combat damage to a player, cast any number of cards exiled with her without paying their mana costs.

Flash
Flying
When Fang Luo enters, exile target spell or creature an opponent controls with mana value 4 or less, then its owner puts it onto the battlefield face down. (It's a 2/2 creature.)

Flying, haste
Whenever Fang, the Lavaclasm enters or attacks, it deals 2 damage to each other creature.

Flying, vigilance, indestructible
Faradia, Honored Sovereign can't attack or block unless you tap three other untapped creatures and/or artifacts you control.

Faux, Who Lives for the Hunt enters as a copy of a creature card in your graveyard except it's legendary and has changeling and “When this creature dies, if it didn't have a bounty counter on it, return it to the battlefield with a bounty counter.” (It has “When this creature dies, each opponent draws a card” as long as it has a bounty counter on it.)

When Fearless King Shabil enters, reveal the top five cards of your library. You may put a Cat card from among them into your hand. Put the rest on the bottom of your library in any order.
At the beginning of combat on your turn, each Cat you control gains all abilities of each other Cat you control until end of turn.

Flying
At the beginning of your upkeep, create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)

When Fel Alston, Halfway Queen enters, return target creature card from your graveyard to the battlefield. Then exile that creature unless Fel Alston was cast for its escape cost.
Escape—{1}{W}{U}{B}, Sacrifice two creatures. (You may cast this card from your graveyard for its escape cost.)

Reach
{G}, Sacrifice Fencas: Search your library for a land card, reveal it, put it into your hand, then shuffle.
At the beginning of your end step, if you control seven or more lands, return this card from your graveyard to the battlefield.

Once each turn, you may cast a creature you control from the battlefield.
(You can cast its Adventure this way.)

{R/G}: Fento, Nova Crusader gains haste and trample until end of turn.
Whenever Fento, Nova Crusader attacks, you may put a creature card from your hand onto the battlefield tapped and attacking. If you do, sacrifice that creature at the beginning of the next end step.

Whenever Ferris, the Sapphire Storm or another creature you control enters, each opponent mills X cards, where X is that creature's power.

Whenever another nontoken creature you control dies, create a 1/1 black Rat creature token with “This creature can't block” if this is the first time this ability has resolved this turn. Otherwise, Ffion, Famine Warcaller deals 1 damage to each player.