msem-instigator

When Far-Realm Guardian enters, create a green Aura enchantment token named Wild Bounty attached to target creature. The token has enchant creature and “Enchanted creature gets +1/+1 and has ward {2}.”

Whenever one or more other creatures you control enter, you gain 1 life. If at least one of those creatures was a Cleric, you gain 2 life instead.
As long as you have at least 8 life more than your starting life total, other Clerics you control get +1/+1.

Faradia's Favored attacks each combat if able.
Whenever you pay a tithe, you may return Faradia's Favored from your graveyard to the battlefield.

{1}{W}, {T}: Aetherize target creature you control. (To aetherize, create a token that's a copy of it, then exile that token.)

Enchantment spells you cast cost {1} less to cast.

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.

Flying
{1}{U}, Sacrifice Fatewrench: Fateseal 2. (To fateseal 2, look at the top two cards of an opponent's library, then put any number of them on the bottom of that player's library and the rest on top in any order.)

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.)

Haste
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
When Favoured Firebrand dies, you may pay {U}{R} any number of times. Whenever you do, Favoured Firebrand deals 2 damage to any target and you draw a card.

When Fearless Realmwalker enters, put a +1/+1 counter on each of up to two target creatures.
Whenever Fearless Realmwalker attacks, you may pay {2}{W}. If you do, aetherize it. (To aetherize, create a token that's a copy of it, then exile that token.)

Battalion — Whenever Fearsome Army and at least two other creatures attack, creatures you control gain menace until end of turn.

When Feathered Dancer enters, up to three target creatures can't block this turn.

Whenever you cast a spell that doesn't share a color with Feathered Warden, you may gain 1 life.

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.

Armed — Fellor Elite has double strike as long as it's equipped.

Fellor Vanguard gets +1/+1 as long as you control a Mountain.
{1}{R}: Fellor Vanguard gets +1/+0 until end of turn.

{R}{W}, {T}: Femourri Archer deals damage equal to its power to any target. You gain that much life.

{T}: Add {G}.

Double strike
When Fencing Tutor enters, create a 0/1 white Soldier creature token with double strike.

Trample
When Feral Devout enters, choose one —
• Put a +1/+1 counter on Feral Devout.
• Create a colorless artifact token named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.”

Ferried Stagecoach can't be blocked as long as another creature is attacking.
Whenever Ferried Stagecoach deals combat damage to a player, each player flips a coin. Each opponent that loses the flip discards a card, and each player on your team that wins the flip draws a card.

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

Menace
When Fervent Devout enters, choose one —
• Put a +1/+1 counter on Fervent Devout.
• Create a colorless artifact token named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.”

Festive Servitor gets +1/+1 for each color among spells you've cast this turn.
{2}: Add one mana of any color.

When Fetching Gancanagh dies, draw a card. At the beginning of the next end step, up to one target creature you control becomes a copy of Fetching Gancanagh.