msem-instigator

When Flame Ascetic enters, you may exile up to one instant card and up to one sorcery card from your graveyard. Put a +1/+1 counter on Flame Ascetic for each card exiled this way.

Flame Jolt deals 2 damage to target creature and 1 damage to target player or planeswalker.

When Flame Juggler dies, it deals 3 damage to each opponent.

Flameblade deals 4 damage to target player or planeswalker.

When Flameboon Alchemist dies, you may put a +1/+1 counter on target creature you control.

Enchant creature you control
When Flamespeaker's Craft enters, it deals 2 damage to any target.
Enchanted creature has “{T}, Discard a card: Draw a card.”

Harness (You may tap a creature you control as you cast this spell. If you do, reduce this spell's mana cost by that creature's power.)
Flamethrower deals 4 damage to any target.

{2}: Equipped creature gets +1/+0 until end of turn.
Equip {1}

{3}{R}: Target creature can't block this turn.

Target creature you control fights another target creature. If either of those creatures would die this turn, exile it instead.

Untap target creature you control. It gains indestructible until end of turn. Create a Weapon token, then attach it to that creature. (A Weapon token is an Equipment artifact with “Equipped creature gets +1/+1” and equip {2}.)

Creatures you control get +1/+1 and gain first strike until end of turn.

Siphon (Each -1/-1 counter you put on your creatures up to their remaining toughness while casting this pays for {1}.)
Counter target spell unless its controller pays {4}.

Target creature can't be blocked this turn.
Proliferate. (Choose any number of permanents and/or players with counters on them, then give each another counter of each kind already there.)

Flash
This spell costs {1} less to cast for each Dragon you control.
Flying

Target player mills four cards.
Inscribed creature has flying.
Inscribe {2}{U} ({2}{U}: Exile this card from your hand inscribed on a creature you control. Whenever that creature attacks, its controller may cast a copy of the inscribed card without paying its mana cost. Inscribe only as a sorcery.)

Whenever you cast a black spell, put a +1/+1 counter on Flenser's Lieutenant.
{B}{B}: Return Flenser's Lieutenant from your graveyard to your hand.

{3}{B}: Regenerate Flesh Hoarder Ghoul. (The next time this creature would be destroyed this turn, it isn't. Instead tap it, remove all damage from it, and remove it from combat.)

Whenever a creature an opponent controls dies, monstrosity 1. (If this creature isn't monstrous, put a +1/+1 counter on it and it becomes monstrous.)

You may put a creature card with mana value 2 or less from your hand onto the battlefield.
Draw a card.

When Fleshcage Shambler dies, create a 2/2 colorless Spirit creature token.

Equipped creature gets +2/+2.
Equip {3}

Fleshcrawler gets +1/+0 for each player that has lost life this turn.

Deathtouch
When Flesheater Vine enters, you may have it consume. If you do, put a +1/+1 counter on it and you gain 3 life. (To consume, sacrifice another creature or exile a creature card from your graveyard.)