msem-instigator

Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)

Equipped creature gets +1/+1 and has hexproof.
Whenever equipped creature deals combat damage to a player, you may return up to one target instant or sorcery card from your graveyard to your hand.
Equip {3}

If a player would gain life, that player adds that much {C} instead.

If a source you control would produce two or more mana, you may have it produce an additional {C}.
{4}: Exile the top card of your library. You may play it until the end of your next turn.

Until end of turn, target noncreature, non-Equipment artifact becomes an Equipment with equip {X} and “Equipped creature gets +X/+0”, where X is that artifact's mana value.

Vanishing 2 (This permanent enters with two time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)
Whenever a time counter is removed from Evade the Authorities, you may return target creature to its owner's hand.

Counter target spell and each other spell with the same name as that spell.

Whenever a nontoken creature dies, you may exile that card. If you do, return each other card exiled with Tome of the Lidless Gaze to its owner's graveyard.
At the beginning of your upkeep, if you control no Eyes, create a token that's a copy of a card exiled with Tome of the Lidless Gaze except it's a 2/2 Eye Horror with flying in addition to its other types.

Destroy target permanent. Trigger a death knell of any number of permanents you control.

For each creature target player controls, that player flips a coin. If the coin comes up tails, that player shuffles that creature into its owner's library.

First strike (This creature deals combat damage before creatures without first strike.)
Whenever Cauldish Warmonger attacks, create a 1/1 white Soldier creature token that's tapped and attacking.

Menace
As long as you control exactly one other creature, that creature gets +1/+1 and has menace.

Look at the top three cards of your library. Put one of them into your hand and the rest into your graveyard.
Flashback {3}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

When Clairvoyant Mage enters, scry 2. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

Target attacking creature gets +3/+0 until end of turn.

Magma Spray deals 2 damage to target creature. If that creature would die this turn, exile it instead.

When Phantom Threader enters, create a white Aura enchantment token named Spectral Whispers attached to target creature. The token has enchant creature and “Enchanted creature has double strike as long as you control it. Otherwise, it can't attack or block.”

Flying
Morph {3}{W}{B} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)
When Wings of Reckoning is turned face up, target tapped creature gets -2/-2 until end of turn.

Flying
Whenever Haerthach, the Wight King deals combat damage to a player, you may sacrifice another creature. When you do, create a 1/1 white Spirit creature token with flying. Return the sacrificed card to the battlefield tapped and under your control at the beginning of the next end step.

Wu Xing (Add effects based on the number of colors of mana spent to cast this spell.)
1 | Mill five cards. An opponent separates the milled cards into two piles. Put one pile into your hand.
5 | You may cast a nonland card from the other pile without paying its mana cost.

You gain 3 life. Choose one —
• You gain 3 life.
• Draw a card.

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

Flying
Whenever Buzzing Flitter attacks, you may pay {G}. If you do, untap target permanent.

Harmony — Attach Arcane Saxophone to target creature.
When Arcane Saxophone enters, harmonize. (Trigger up to one harmony of one permanent you control.)
Equipped creature gets +2/+2.
Equip {4}

Exile target land. Create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)