msem-instigator

Exile target instant or sorcery card from your graveyard. Copy it. You may cast the copy. (Cast a copy of this spell once while this creature is on the battlefield.)

Target creature gets +4/+3 until end of turn. Put a trample counter on it.

End the turn. If it's an opponent's turn, they take an extra turn after this one. (Exile all spells and abilities from the stack, including this card. The player whose turn it is discards down to their maximum hand size. Damage wears off, and “this turn” and “until end of turn” effects end.)

Flying, trample
When Whisper in the Rift enters, target player mills half their library, rounded down.
When Whisper in the Rift dies, you may cast up to two instant, sorcery, and/or creature cards from among opponent's graveyards without paying their mana cost.

Whenever Sentry of Kollis Gate is dealt damage, put a +1/+1 counter on each other creature you control.

Creatures you control without counters on them get +2/+2.
Whenever you attack, target attacking creature gains trample until end of turn.
At the beginning of your end step, sacrifice this enchantment unless you put two -1/-1 counters on a creature you control.

Target creature gets +2/+2 and gains flying and lifelink until end of turn.
Orchestrate {W} (You may exile this card from your hand anytime you could cast a sorcery for its orchestrate cost. When you next resolve a spell, you may cast this from exile without paying its mana cost.)

Create a 1/1 colorless Construct Actor creature token. Put a +1/+1 counter on it if you control another Construct.
Compose (Then if you cast this from your hand, exile it and create a Saga token with “r3—You may cast a copy of this card from exile without paying its mana cost.”)

Target creature gains deathtouch until end of turn. Regenerate it.

At the beginning of your upkeep, if Stonework Infantry is on the battlefield, each player returns all cards named Stonework Infantry from their graveyard to the battlefield.

Flying
Whenever you cast a spell with mana value 4 or greater, sacrifice Fractured Prodigy. If you do, create two tokens that are copies of Fractured Prodigy.

Enchant creature
Enchanted creature has distorted. (It can be blocked by tapped creatures but not untapped creatures.)
{1}{B}: Enchanted creature can't block this turn.

Choose one —
• Ire of Ancient Tomes deals 2 damage to any target.
• Target instant or sorcery card in your graveyard gains flashback until end of turn. The flashback cost is equal to its mana cost.

Whenever you cast an Aura spell, put two +1/+1 counters on Traveling Thespians.

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

Parish Paragon gets +1/+1 for each creature you control.
All damage that would be dealt to other creatures you control not named Parish Paragon is dealt to Parish Paragon instead.

[+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.

Target creature gets -2/-1 until end of turn. When it dies this turn, its controller loses 5 life.

Whenever you draw your second card each turn, other creatures you control get +1/+1 and gain indestructible until end of turn.

Menace
Vanguard — Whenever a creature you control attacks alone, it gets +1/+1 until end of turn for each creature card in your graveyard.

Hexproof
Rapport — Whenever Depths Stalker and at least one other creature you control become tapped, Depths Stalker gets +1/+0 until end of turn and can't be blocked this turn.

Target creature gets +1/+0 and gains first strike until end of turn. Put a deathtouch counter on it.

{1}, {T}, Move a -1/-1 counter from another creature onto Zealous Bloodletter: Proliferate. (Choose any number of permanents and/or players with counters on them, then give each another counter of each kind already there.)

As an additional cost to cast this spell, sacrifice an artifact or creature.
Draw two cards.