msem-instigator

Exile target creature and all other creatures with the same name as that creature. Search all graveyards, hands, and libraries for any number of cards with the same name as that creature and exile them. Then players shuffle their libraries searched this way.

Creatures you control get +2/+0 until end of turn. Scouts you control gain trample until end of turn.

Equipped creature gets +2/+2 and has double strike and trample.
Equip {5}

Exile target creature or planeswalker, then for each counter on that permanent, you may put a counter of that kind on a permanent you control.

At the beginning of your end step, if a counter was put on a permanent you control or controlled this turn, draw a card.

Vigilance
Whenever Fate Tracer attacks, rediscover a creature or enchantment card X times, where X is Fate Tracer's power. (Repeat this process X times: Look at the top card of your library. You may reveal it and put it into your hand if it's a creature or enchantment card. Otherwise, put it back or into your graveyard.)

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.

Whenever a permanent with one or more counters on it is put into your graveyard from the battlefield, it deals that much damage to any target and you gain that much life.

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.)

You may have Fleeting Memory enter the battlefield as a copy of any creature on the battlefield, except it has “At the beginning of the end step, exile this creature.”

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.)

Return all creatures with toughness 3 or less to their owners' hands.
Investigate three times. (To investigate, create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)

{T}: Add {C}.
{T}, Sacrifice Fluctuating Locale: Rediscover a land card. (Look at the top card of your library. You may reveal it and put it into your hand if it's a land card. Otherwise, put it back or into your graveyard.)

{2}{W}: Reappropriate. When you do, choose X, where X is one plus the number of artifact and/or enchantment cards exiled this way. You may choose the same mode more than once.
• Exile target creature you own. At the beginning of the next end step, return that card to the battlefield under your control.
• Scry 2.
• Gain 3 life.

At the beginning of each combat, prevent all combat damage that would be dealt to and dealt by up to one target creature this turn.
{X}{G}{U}, Sacrifice Foreboding Calm: Create an X/X green and blue Plant Horror creature token with hexproof and trample.

{T}: Add {C}.
{T}, Reappropriate: Add {W} or {B}. (Exile exactly two cards from your hand and/or graveyard.)

Flying
When Foul Drifter enters the battlefield, target creature gets -1/-1 until end of turn.

When Fractal Findings enters the battlefield, investigate. (Create a colorless Clue artifact token with “{2}, Sacrifice this artifact: Draw a card.”)
Whenever you sacrifice a Clue, you may draw a card, then discard a card. (You make this choice before drawing a card from the Clue.)

Friend of the Woods has hexproof as long as it has a +1/+1 counter on it.
{1}{G}, {T}: Put a +1/+1 counter on Friend of the Woods.

When Gnuge-District Hoarder enters the battlefield, each opponent loses 1 life. You gain life equal to the life lost this way.
Paranoia {1}{B} (You may cast this spell for its paranoia cost when a permanent you control leaves the battlefield.)

When Godseeker Vanguard enters the battlefield, create two 1/1 green Scout creature tokens.

When Godwatcher enters the battlefield, search any player's library for a creature card, exile it, then they shuffle their library.
When Godwatcher dies, put the exiled card onto the battlefield under your control.

Flying

{T}: Add {C}.
{T}, Reappropriate: Add {B} or {G}. (Exile exactly two cards from your hand and/or graveyard.)

{T}: Add one mana of any color.
Paranoia {G} (You may cast this spell for its paranoia cost when a permanent you control leaves the battlefield.)