msem-instigator

Enchant creature
Enchanted creature gets +2/+2.
Whenever enchanted creature attacks, create a 2/2 white Knight creature token that's tapped and attacking.

Infiltrate (Whenever one or more attacking creatures you control aren't blocked, this creature gets +1/+1 until end of turn.)
When Exile's Vanguard enters, tap target creature. That creature doesn't untap during its controller's next untap step.

When Exiled Necromancer enters, return target permanent card with mana value 1 or less from your graveyard to the battlefield.

Other Elves you control get +1/+1.
Whenever another Scout you control deals combat damage to a player, you may reveal the top card of your library. If it's a land card, put it onto the battlefield tapped.

Vigilance
Players can't untap more than two lands during their untap steps.

Flying, first strike
Vanishing (At the beginning of your upkeep, remove a time counter from this permanent. When the last is removed, sacrifice it.)
Fadefeather Griffin enters with a time counter on it for each other creature you control.

When Fading Prison enters, exile target creature until Fading Prison leaves the battlefield.
{W}, Sacrifice Fading Prison: Exile target creature you control, then return that card to the battlefield under its owner's control.

When Fae-Blessed Attendant enters, investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)
Whenever you sacrifice a Clue, untap target permanent.

You may cast this spell as though it had flash if you pay an additional {1} to cast it.

Whenever you gain life, put a +1/+1 counter on Faithful Acolyte.
Faithful Acolyte has lifelink as long as it has four or more +1/+1 counters on it.

Whenever you gain life, target opponent loses that much life.
{T}, Pay 3 life: Flip a coin. If you win the flip, you gain 6 life.

Each player sacrifices a creature. Create a tapped 2/2 black Zombie creature token.

Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.
Kindle 2—{2}{G} ({2}{G}, Exile this card from your graveyard: Create two 1/1 colorless Elemental creature tokens. Kindle only as a sorcery.)

Flying
When Fickle Songstress enters, target opponent gains control of it.
Whenever you lose life, if you don't own Fickle Songstress, its owner gains control of it.

Field of Obelisks enters tapped.
As Field of Obelisks enters, choose a color other than white.
{T}: Add {W} or one mana of the chosen color.

As an additional cost to cast this spell, sacrifice a creature.
Exile target creature.

Finish the Job deals 5 damage to target creature that was dealt damage this turn. If that creature would die this turn, exile it instead.

Fire and Ashes deals X damage to any target. If a creature dealt damage this way would die this turn, exile it instead.

Create three 1/1 red Elemental creature tokens.

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

Enchant creature
Enchanted creature gets +2/+2.
Kindle 2—{2}{W} ({2}{W}, Exile this card from your graveyard: Create two 1/1 colorless Elemental creature tokens. Kindle only as a sorcery.)

Put target creature with power X or less on top of its owner's library.
Investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)

Forestheart Elemental enters with a +1/+1 counter on it for each land you control.

Target creature gets +2/+2 until end of turn. If you cast this spell from exile, that creature gets +4/+4 and gains trample until end of turn instead.
Prophecy {G} (Once each turn, you may exile a card with prophecy as you reveal it. When you do, you may cast it for its prophecy cost as long as it's exiled.)

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever you cast a noncreature spell, Frilled Drakeling gains menace until end of turn.