msem-instigator

When Pre-Crime Handler enters, conjure a card named Data-Point into your hand. You gain 2 life. (It's a sorcery that costs {2} with “Draw a card.”)

Choose one —
• Meteor Fall deals 4 damage to each creature and each planeswalker.
• Meteor Fall deals 8 damage to target creature or planeswalker.

This spell costs {1} less to cast for each creature type among creatures you control.
Return up to two target cards from your graveyard to your hand. Exile Intersection of Fates.

I, II — Scry 2.
Discovery — Whenever a land you control enters, if it doesn't have the same name as another land you control, draw a card.

Menace
When Fenhauler Gang enters, each player mills three cards.
Whenever Fenhauler Gang deals combat damage to a player, return up to one target creature or land card from your graveyard to your hand.

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.

Enchant creature
Enchanted creature doesn't untap during its controller's untap step.
{1}{U}: Tap enchanted creature.

Up to three target creatures each get +1/+1 until end of turn.

Morningstar Blaze deals X damage divided as you choose among one or two targets.

The first creature spell you cast each turn costs {2} less to cast.
At the beginning of your upkeep, return a creature you control to its owner's hand. If you do, you draw cards and gain life equal to its power.

Hexproof

When Chroma's Guidance enters, create a 2/2 green Wolf creature token.
Whenever you create a creature token, put a +1/+1 counter on it.

Whenever you cast a noncreature spell, you may have target player mill two cards. Then if a player has twenty or fewer cards in their library, put a +1/+1 counter on Living Atrocity.

When you cast an instant or sorcery spell, you may sacrifice Shard Flower. If you do, copy that spell. You may choose new targets for the copy.

[+2]: Destroy up to one target noncreature permanent.
[0]: Grohl becomes a legendary green 6/6 Elk Giant creature with trample, hexproof, and haste until your next turn.
[–9]: For each permanent you control, create a token that's a copy of it.

Gestalt (When this or another creature enters under your control, you may merge it with the one in play, keeping counters and attachments. They become the permanent on top plus all abilities from under it.)
Whenever this creature attacks, target creature blocks it this combat if able.

[+1]: Search each player's graveyard, hand, and library for any number of cards with the same name as target nonbasic card in a graveyard and exile them. Then each player shuffles.
[–2]: Each player draws two cards, then each opponent exiles two cards at random from their hand.
[–5]: You may cast a card exiled with Mei Liva without paying its mana cost.

Whenever another creature you control enters, target instant or sorcery card in your graveyard with mana value less than or equal to that creature's power gains flashback until end of turn. The flashback cost is equal to its mana cost. (You may cast that card from your graveyard for its flashback cost. Then exile it.)

When Whiterun Ordainer enters, you gain 4 life.

({T}: Add {B} or {R}.)
Whenever Crumbling Precipice becomes tapped, you lose 1 life unless you control two or more basic lands.

When Leyline Invoker enters and at the beginning of your upkeep, you may mill two cards.
{5}{B}, {T}, Sacrifice Leyline Invoker: Return target creature card from your graveyard to the battlefield. This ability costs {1} less to activate for each creature card in your graveyard.

Whenever a creature dealt damage by Mooncursed Howler this turn dies, create a 2/2 red Werewolf creature token with first strike.

Distant Path enters tapped unless you control one or fewer other lands.
{T}: Add {W} or {U}.
Cycling {2} ({2}, Discard this card: Draw a card.)

Flying
Whenever another creature you control enters, you may search your library for an instant or sorcery card with the same mana value as that creature, reveal it, put it into your hand, then shuffle.

When Aridland Camaar enters, create a 1/1 white Bird creature token with flying.