msem-instigator

Choose one —
• Fatefire deals X damage to target creature. It loses indestructible until end of turn.
• Fatefire deals 2 damage to each creature if X is 2. Creatures dealt damage this way lose indestructible until end of turn.

Look at the top three cards of your library. Put one of them into your hand and the rest into your graveyard.
Tether (Then if you cast this from your hand, you may exile it tethered to a creature you control. When it dies, you may cast this from exile without paying its mana cost.)

Target opponent mills five cards. Then exile a card milled this way. You may cast that card for as long as it remains exiled, and you may spend mana as though it were mana of any color to cast that spell.
Tether (Then if you cast this from your hand, you may exile it tethered to a creature you control. When it dies, you may cast this from exile without paying its mana cost.)

When Felhide Marauder enters the battlefield, if you control a creature with power greater than its base power, Felhide Marauder gains haste until end of turn.

Return up to two target creature cards from your graveyard to your hand. If you control a creature with power greater than its base power, you gain 3 life.

Colossal 3—{4}{R}{G} (You may cast this for its colossal cost to have it enter with three +1/+1 counters; or pay {4}{R}{G} as a sorcery: Put three +1/+1 counters on it if it has none.)
Each creature you control with a counter on it can't be blocked by more than one creature.

Enchant creature you control
When Festive Euphoria enters the battlefield, you gain life and draw cards equal to enchanted creature's power.
Enchanted creature can't be blocked by creatures with power 2 or less.

Flash
Flying
{2}{B}, Exile three cards from your graveyard: Create a tapped 2/2 black Zombie creature token.

Flying
Whenever another artifact enters the battlefield under your control, Filigree Drake gets +1/+1 until end of turn.

{T}: Add three mana in any combination of colors. Spend this mana only to cast artifact spells or activate abilities of artifacts.

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

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

Deathtouch
When Flesheater Vine enters the battlefield, 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.)

Target creature you control deals damage equal to its power to target creature you don't control. Scry 1.

Heroic — Whenever you cast a spell that targets Floodspeaker Triton, put a +1/+1 counter on Floodspeaker Triton, then scry 1.

When Fodder Goblins enters the battlefield, create a 1/1 red Goblin creature token.

{T}: Each opponent loses 1 life.
Whenever you cycle a card or cast a spell with a cycling ability, untap Font of Nefarox.

Exile target artifact, enchantment, or creature with flying.

Forbidding Isle enters the battlefield tapped unless you control a Swamp.
{T}: Add {U} or {R}.

Heroic — Whenever you cast a spell that targets Forge Adept, create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)
{6}{R}: Create a 3/3 colorless Golem enchantment artifact creature token. If mana from an artifact was spent to activate this ability, that token gains haste.

Fortress Arena enters the battlefield tapped.
{T}: Add {R} or {W}.
{2}{R}{W}, {T}, Sacrifice Fortress Arena: Draw a card.

First strike
Stampede — Whenever Frenzied Nacatl and a creature with greater power attack, Frenzied Nacatl gets +2/+0 until end of turn.

Frigid Highlands enters the battlefield tapped unless you control an Island.
{T}: Add {R} or {G}.

Create three 1/1 green Saproling creature tokens.

Trample
Cycling {2} ({2}, Discard this card: Draw a card.)