msem-instigator

Equipped creature gets +0/+2.
As long as equipped creature is a Wizard, it has “{T}: Scry 1.”
Equip {2} ({2}: Attach to target creature you control. Equip only as a sorcery.)

{T}: Target player mills a card.
{4}, {T}, Exile Dusty Record: Target player shuffles their graveyard into their library.

When Wretched Spawn enters, you may return target permanent to its owner's hand. If you do, that player discards a card.
Unearth {4}{U}{B} ({4}{U}{B}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the end step or if it would leave the battlefield. Unearth only as a sorcery.)

When Warden of Rehis-Dorahn enters, put a -1/-1 counter on each creature.
{2}{B}{G}, {T}: Destroy target creature with a counter on it.

Unearthed Legion's power and toughness are each equal to the number of cards in your graveyard.
At the beginning of your upkeep, mill a card.

Whenever you copy an instant or sorcery spell, you may pay {1}{U}. If you do, draw a card.
Whenever you cast an instant or sorcery spell, you may pay {1}{R}. If you do, Unbound Researchers deals 2 damage to target player or planeswalker.

When Thoughtgrinder enters, each player discards a card.
Unearth {1}{U}{B} ({1}{U}{B}: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the end step or if it would leave the battlefield. Unearth only as a sorcery.)

Switch each creature's power and toughness until end of turn.

Target creature gets +2/+2 until end of turn. Untap it.

Flying
Whenever Spellgorger Elemental attacks, discard a card at random. If an instant or sorcery card is discarded this way, Spellgorger Elemental deals 3 damage to any target. Otherwise, draw a card.

Target creature gains trample until end of turn. The next time a source of your choice would deal damage to that creature, prevent that damage. If damage is prevented this way, that creature gets +X/+0 until end of turn, where X is the amount of damage prevented this way.

If one or more -1/-1 counters would be put on a creature an opponent controls, put twice that many -1/-1 counters on it instead.

Choose one—
• Put two -1/-1 counters on target creature.
• Untap target creature. It gains deathtouch until end of turn.
• Until end of turn, target creature deals damage to creatures in the form of -1/-1 counters.

Indestructible
Battalion — Whenever Rallios, Heir to the Evil One and at least two other creatures attack, creatures you control get +1/+0 and gain double strike until end of turn.

Purger of Blights enters with a -1/-1 counter on it.
{2}{B}{G}, {T}, Remove a -1/-1 counter from a creature you control: Draw a card.

Creatures you control gain deathtouch until end of turn and must be blocked this turn if able.

{B}{G}, {T}, Remove a -1/-1 counter from a creature you control: Create a 1/1 green Elf Druid creature token.

When Poisonblade Herald enters, put a -1/-1 counter on a creature you control.

Mill X cards. Then you may return a creature card with mana value X or less from your graveyard to the battlefield.

Target player mills four cards.
Draw a card.

Identity — Phalanx's Shieldbearer has hexproof as long as you control at least two other creatures that share a creature type with it.

Remove all counters from target creature. You gain 1 life for each counter removed this way.

Lifelink
Whenever Painstriker attacks, it deals 2 damage to target creature defending player controls.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever Nimble Elemental deals combat damage to a player, you may draw a card. If you do, discard a card.

[+1]: Merkurio deals 2 damage to target player or planeswalker. That player or that planeswalker's controller may draw a card.
[–2]: The next instant or sorcery spell you cast this turn costs {U}{R} less to cast. This effect reduces only the amount of colored mana you pay.
[–7]: You get an emblem with “Each instant and sorcery card you own has reverberate {X}, where X is its mana value.” (When you cast a spell, copy it if you paid its reverberate cost. You may choose new targets for the copy.)