msem-instigator

Vigilance
When Coralight Sentinel enters, create a white Aura enchantment token named Crab's Resolve attached to target creature. The token has enchant creature and “Enchanted creature gets +0/+2.”

Whenever you cast a white spell, creatures you control get +1/+0 until end of turn.
Whenever you cast a blue spell, draw a card, then discard a card.

Enchant opponent
Whenever enchanted opponent casts a spell, you may reveal cards from the top of your library until you reveal a nonland card that costs less. Exile that card, and put the rest on the bottom in a random order. You may play the exiled card until the end of your next turn.

When Core Paradigm enters, conjure five cards named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)
Up to three times each turn, you may cast a sorcery spell without paying its mana cost.

This spell costs {1} less to cast for each artifact you control.
Draw three cards, then Corecharge deals damage to any target equal to the number of cards in your hand.

[+2]: Put two +1/+1 counters or loyalty counters on up to one other target creature or planeswalker.
[0]: Cornrose, the Mighty deals 3 damage to target creature. That creature deals damage equal to its power to Cornrose.
[–2]: Until end of turn, target creature gets +X/+X and gains trample, where X is its power.

Whenever another Zombie you control enters, you may pay {1}{B}. If you do, exile target creature card from a graveyard. You gain life equal to its toughness.

Corpse Thief can't be blocked by creatures with greater power.
Whenever Corpse Thief deals combat damage to a player, return target creature card from your graveyard to your hand.
{3}{G}{G}: Mill half your library, rounded down. Transform Corpse Thief. Activate only as a sorcery.

When Zwurg enters, you may discard your hand. If you do, draw X cards and add X {R}, where X is the number of different sources that dealt damage to an opponent this turn.

Whenever another Zombie or Demon creature you control enters, 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.”)

Menace
Whenever you cast an instant or sorcery spell, create a 2/2 black Zombie creature token. This ability triggers only once each turn.

Return target creature or planeswalker card from your graveyard to the battlefield. If that card was a creature, it's an Actor in addition to its other types.

Menace
Sacrifice another creature: Corpulent Gibberer deals 1 damage to any target.
Evoke {1}{R} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters.)

Exile a creature card from your graveyard: Put two loyalty counters on Corpus. Activate only as a sorcery and only once each turn.
[–2]: You may sacrifice a creature. If you do, create a 4/4 red Horror creature token with menace. Otherwise, create a 2/2 black Zombie creature token.
[–4]: Search your library for two non-Corpus cards and reveal them. Put one into your hand and the other into your graveyard, then shuffle.

First strike, trample
{2}{R}, Sacrifice a land: Corrignos' Rage gets +3/+0 until end of turn.

At the beginning of your upkeep, choose one —
• You lose 1 life.
• You draw two cards and you lose 3 life.
• Search your library for a card, put it into your hand, then shuffle. You lose 5 life.

When Corrupt Warden enters, up to one target creature gets -X/-X until end of turn, where X is the number of card types among cards in your graveyard.

This spell costs {1} less to cast for each card type among cards in your graveyard.
Deathtouch

Each player reveals the bottom six cards of their library. For each player, put up to one permanent card revealed this way onto the battlefield under your control.

Flying
{1}{B}, {T}: Destroy target creature that was dealt damage this turn.

Rhapsody {5}{R}{R} (Pay {5}{R}{R} to cast this as a 4/4, or as a sorcery to make it become a 4/4.)
When Corrupted Guardian enters, it deals damage equal to its power to up to one target player or planeswalker.

Enchant creature
Enchanted creature gets +3/-2.

Whenever you cast a white spell, target player loses 2 life and you gain 2 life.
Whenever you cast a green spell, put a +1/+1 counter on Corrupted Warlord.

Enchant creature
Enchanted creature gets -3/-3 and has “At the beginning of your upkeep, you lose 3 life.”

Melee (Whenever this creature attacks, it gets +1/+1 until end of turn for each opponent you attacked this combat.)
Corym's Elite can't be blocked by creatures with power 2 or less.