msem-instigator

Each opponent mills half their library, rounded up. When they do, return target creature card from a graveyard to the battlefield under your control.

Wither (This deals damage to creatures in the form of -1/-1 counters.)

{4}, {T}, Sacrifice Yenzu Ritual Vessel: Yenzu Ritual Vessel deals 4 damage to target creature or planeswalker.

[+1]: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.
[–3]: You get an emblem with “{1}{G}: You may play an additional land this turn.”
[–6]: Creatures you control gain trample and have base power and toughness X/X until end of turn, where X is the number of lands you control.

Flying
Vanishing (At the beginning of your upkeep, remove a time counter from this permanent. When the last is removed, sacrifice it.)
Ficklewing Elemental enters with a time counter on it for each card in your hand.

Whenever you cast a spell with mana value greater than the number of loyalty counters on Kunal, Dragonclaw's Legacy, put a loyalty counter on him.
[0]: Until end of turn, Kunal becomes a Monk creature with haste, indestructible, and “Kunal's base power and toughness are each equal to the number of counters on him.”
[–2]: Return target card from your graveyard to your hand.

When this creature enters, you may return another target creature you control to its owner's hand. If you do, create a Treasure token.

Ferocious Flame deals 2 damage to any target. If you control a creature with power 4 or greater, it deals 4 damage instead.

Flash
Whenever you cast your second spell each turn, put a +1/+1 counter on Brooding Replacement.

This spell can't be countered.
Hexproof

Harmony — Destroy target artifact or enchantment.
When Rejoicing Aristocrats enters, harmonize. (Trigger up to one harmony of one permanent you control.)

Lifelink
Vitality of Blossoms has indestructible as long as your life total is greater than your starting life total.

Whenever you cast a spell, for each of that spell's colors, create a 1/1 Scout creature token that's all colors.

You may have Blurry Counterpart enter as a copy of any creature on the battlefield.
Mirage {1}{U} (You may cast this spell as though it had flash for its mirage cost. If you do, sacrifice it at the beginning of the next cleanup step.)

Take an extra turn after this one. At the beginning of that turn's upkeep, if you control a legendary creature, each opponent exiles the top card of their library. Until the end of that turn, you may play those cards and you may spend mana as though it were mana of any type to cast those spells.
Exile Stolen Moments.

Exile target creature. Search its controller's graveyard and library for any number of cards with the same name as that creature and exile them. Then that player shuffles.

Erratic (When this creature dies, reveal the top four cards of your library. Put a creature card that costs less than this revealed this way onto the battlefield and the rest on the bottom of your library in any order.)

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.

Equipped creature gets +1/+1 and has prowess.
Equip {2}

Enchant creature
When Claustrophobia enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

Create a 3/3 white Construct enchantment creature token.

Target opponent discards a card. If they can't, draw a card. (Then exile this card. You may cast the creature later from exile.)

Reach
Improve {1}{G/W} ({1}{G/W}: Put a +1/+1 counter on this creature. This costs {1} more to activate for each +1/+1 counter on it. Improve only as a sorcery.)
If one or more +1/+1 counters would be put on a creature you control, that many plus one +1/+1 counters are put on that creature instead.

Whenever Simian Striker attacks, it gets +3/+0 until end of turn.

Foretell {1}{B} (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.)
Create two X/X black Zombie creature tokens with menace, where X is the number of nontoken creatures that died under your control this turn.