msem-instigator

Choose a card name, then look at the top card of your library. If it has the chosen name, you may exile it and you may play it from exile until end of turn.
Whenever a creature you control becomes tapped, you may return Enigma of Seventy Scrolls from your graveyard to your hand.

Flash
When Enlightened Lizard enters, counter target noncreature spell.

Hexproof
At the beginning of your upkeep, target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost.

Return any number of target nonland permanents with different mana values to their owners' hands. If seven or more permanents were returned this way, you may cast spells without paying their mana costs until end of turn.

Flying (This creature can't be blocked except by creatures with flying or reach.)
Escorted Rider gets +1/+1 as long as you control another creature with flying.

When Essence of Nurture enters, put a +1/+1 counter on another target creature, then you gain life equal to that creature's toughness.

When Establish Guard enters or leaves the battlefield, create a 1/1 white Human Soldier creature token and you gain 1 life.

{T}: Create an X/X green Elemental creature token, where X is Evoker of the Ancient Form's power.

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.