msem-instigator

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

Whenever Fated Mariner attacks, forebode. (Create a tapped colorless Omen artifact token with “{T}, Discard a card, Sacrifice this artifact: Draw a card.”)
{1}{U}: Fated Mariner can't be blocked this turn.

When Featherfall Ascetic enters, create a 1/1 white and blue Bird creature token with flying.
Whenever a nontoken Aura enters enchanting Featherfall Ascetic, for each other creature you control, you may create a token that's a copy of that Aura enchanting that creature.

Draw cards equal to the number of cards in your hand, then discard three cards.
Cycling {U} ({U}, Discard this card: Draw a card.)

Archive 5 (As this enters, shuffle the top five cards of your main library into a new face up library. Sacrifice this after the archived library is empty.)
Whenever a permanent card is put into your graveyard from the battlefield, you may put that card on the bottom of the archived library.

Menace
As long as you control exactly one other creature, that creature gets +1/+1 and has menace.

When Fidelity of the Pure dies, create a 1/1 green and white Elk Spirit creature token.
Revive {2}{W} ({2}{W}, Exile this card from your graveyard: Create a token that's a copy of it except it has no mana cost. Revive only as a sorcery.)

Fiery Cannonade deals 2 damage to each non-Pirate creature.

Put a +1/+1 counter on target creature. It gains indestructible until end of turn.

Final Struggle deals 3 damage to target creature. When that creature dies this turn, exile it and create a 3/3 red Shark enchantment creature token.

Flash
When Fireshaper Adept enters, copy up to one target activated or triggered ability. You may choose new targets for the copy.

Experience (Whenever this creature attacks, if it has fewer than three +1/+1 counters on it, put a +1/+1 counter on it.)
When Flame-Tailed Lizard has three or more +1/+1 counters on it, remove them all and transform it.

Flying, first strike
Whenever this creature transforms into Flame-Tested Dragon or attacks, it deals 1 damage to each creature you don't control.

You may have Fleeting Memory enter as a copy of any creature on the battlefield, except it has “At the beginning of the end step, exile this creature.”

Equipped creature has “{T}: Put a charge counter on Flintlock Pistol.”
Whenever equipped creature attacks, remove a charge counter from Flintlock Pistol. When you do, equipped creature gets +3/+0 and gains first strike until end of turn.
Equip {1}

{2}, Exile a card with a cycling ability from your graveyard: Draw a card.
Cycling {3}{G} ({3}{G}, Discard this card: Draw a card.)
When you cycle Foregone Ancestries, you may exile it. If you do, return target card with a cycling ability from your graveyard to your hand.

Up to two target creatures each get +1/+0 until end of turn. Put a first strike counter on each of them.

Enchant opponent
At the beginning of enchanted player's upkeep, they lose 1 life and each of their opponents gains 1 life.
{4}{B}, Sacrifice Forsaken Shores: Enchanted player loses 3 life and you gain 3 life.

Whenever two or more creatures you control deal combat damage to a player, you gain 3 life and create a Treasure token. (It's an artifact with “{T}, Sacrifice this permanent: Add one mana of any color.”)
Whenever you sacrifice your second permanent each turn, you draw a card and you lose 1 life.

Lifelink (Damage dealt by this creature also causes you to gain that much life.)
Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)

First strike
When Frontline Descender enters, you may salvage an instant or sorcery card. (Exile one from your graveyard until this creature leaves the battlefield. Whenever this creature deals combat damage to a player, put a card it salvaged into your hand.)

Flying
Whenever a player casts a spell, if it isn't that player's main phase, each of their opponents may draw a card.

Enchant opponent
Enchanted player plays with the top card of their library revealed.
Whenever enchanted player casts a spell, you may have them mill a card.

Deathtouch
When Ghastly Scorpion dies, you draw a card and you lose 1 life.

Ghost Sloop can't be blocked.
Crew 4 (Tap any number of creatures you control with total power 4 or greater: This Vehicle becomes an artifact creature until end of turn.)
Exile a creature card from your graveyard: Ghost Sloop becomes an artifact creature until end of turn.