msem-instigator

{T}, Sacrifice an artifact or enchantment: Draw a card.

Draw a card. If this spell was foretold, instead surveil 2, then draw two cards.
Foretell {2}{U} (During your turn, you may pay {2} and exile this card from your hand face down. Cast it on a later turn for its foretell cost.)

Battalion — Whenever Barbarian Rager and at least two other creatures attack, Barbarian Rager gets +2/+0 until end of turn.

Flying
When Tengu Skyguard enters, return a permanent you control to its owner's hand.

Conjure into your hand a duplicate of target nontoken permanent you control or permanent card in your graveyard.
Exile Molecular Mimicry.

{R}: Phyrexian Firemaster gains haste until end of turn.

{4}, Sacrifice Ruin Salvager: Return target card from your graveyard to your hand.

Transcend (Activate as a sorcery to gain the next type and a +1/+1 counter.)
Your opponents can't cast spells during your turn.
{W}{U}: Demigod — Until your next turn, whenever an opponent draws a card, you may draw a card.
{4}{W}{U}: God — If it isn't an extra turn, take an extra turn after this one. Untap all permanents you control at the beginning of that turn's end step.

When Path to Battle enters, draw a card, then choose a card name.
Whenever you cast a noncreature spell with the chosen name, create a 1/1 red Warrior creature token with haste.

Delusional Noble enters with a -1/-1 counter on it.

Rhapsody {4}{R}{R} (Pay {4}{R}{R} to cast this as a 4/4, or as a sorcery to make it become a 4/4.)
Trample
Whenever Attuned Slayer deals combat damage to a player, exile that many cards from the top of your library. You may play those cards this turn.

{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a spell that's three or more colors.

Target creature gains indestructible until end of turn. You gain 4 life.
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.)

Lijing has indestructible as long as you control two or more other Foxes.
At the beginning of your upkeep, invigorate 1 another Fox. (Choose another Fox with the least power among other Foxes you control and put a +1/+1 counter on it.)
Once each turn, when another Fox you control enters, you may pay {1}. If you do, draw a card.

Draw a card.
Reprise {2} (As you cast an instant or sorcery spell, you may exile one card with reprise from your graveyard and pay its reprise cost. If you do, add its effects to that spell.)

Prowess
Whenever you cast a noncreature spell, you may pay {R}. If you do, post a bounty on target creature. (Put a bounty counter on that creature. It has “When this creature dies, each opponent draws a card” as long as it has a bounty counter on it.)

When Bustling Bazaar enters, return target artifact, instant, or sorcery card from your graveyard to your hand.
Sacrifice a nontoken artifact: Create two tapped Treasure tokens.

I, II — Mill two cards. You gain 2 life. (Put the top two cards of your library into your graveyard.)
Discovery — During each of your turns, you may cast a permanent spell from your graveyard.

Flying
When Swooping Razorbeak enters, you may return another permanent you control to its owner's hand.

Whenever one or more cards are put into an opponent's graveyard from their hand or library, you may exile the top card of each player's library. Until your next turn, you may cast a card from among those exiled cards and you may spend mana as though it were mana of any type to cast that spell.

Menace
Whenever Ruin Delver attacks, you may sacrifice a land or exile a land card from your graveyard. If you do, you draw a card and you lose 1 life.

Rakkiri Piker has double strike as long as it's embattled. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)

[+1]: Up to one target creature gets +2/+0 until end of turn. Each player loses 1 life.
[–X]: Return target creature card with mana value X from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield.
[–7]: For each 1 life target player has less than their starting life total, create a 1/1 black Bird creature token with flying and deathtouch.

At the beginning of your upkeep, each player discards a card. Then if a player has no cards in hand, you may transform Performer of Ambition.

Target creature gains flying and double strike until end of turn.
Flashback {2}{U}{R} (You may cast this card from your graveyard for its flashback cost. Then exile it.)