msem-instigator

Flash
When Scholar of Reflections enters, you may switch target creature's power and toughness until end of turn.

Target creature gets -3/-2 until end of turn.

Flying
When Masked Stalker enters, target player discards a card.

When Depthlight Brute enters, if you control three or more artifacts, each opponent loses 3 life and you gain 3 life.

{3}, {T}: Return target creature card from your graveyard to the battlefield under target player's control. That creature deals damage equal to its power to that player.

{T}: Add {G}.
Dominance — {T}: Add {G}{G}. Activate only if you control the creature with the greatest power or tied for the greatest power.

Put target spell or nonland permanent on top of its owner's library.
Lifecycle {3} ({3}, Discard this card: Create two tapped 1/1 colorless Elemental creature tokens.)

Whenever one or more creatures in Luocha Mentor's pack attack, each creature in its pack gets +1/+0 until end of turn. (Two or more creatures you control with equal power are in a pack.)

As long as Sigiled Scrollcase is attached to a creature you control, you have no maximum hand size.
Whenever equipped creature dies, draw a card.
Equip {1}

When Vile Progenitor enters, create a 3/2 colorless Horror creature token.
As long as you control five or more lands, Horrors you control get +1/+1 and have trample.
Evoke {1}{G} (You may cast this spell for its evoke cost. If you do, it's sacrificed when it enters.)

Flying
When Cyrukan's Messenger enters, you may search your library for an Equipment card, reveal it, put it into your hand, then shuffle.
Whenever Cyrukan's Messenger attacks, you may put an Equipment card from your hand onto the battlefield attached to Cyrukan's Messenger.

At the beginning of your upkeep, you may reveal a creature card from your hand. If you do, create a token that's a copy of it, except it's 1/1 and is an artifact in addition to its other types.

Equipped creature gets +2/+1.
Whenever equipped creature attacks, create a 1/1 white Peasant creature token that's tapped and attacking.
Equip {2}

Haste
Cycling {2} ({2}, Discard this card: Draw a card.)

During your opponents' turns, Chroma, the Faerie Circle has all basic land types in all zones.
Chroma, the Faerie Circle enters tapped.

Choose one —
• Creatures you control get +2/+0 until end of turn.
• Destroy target artifact or enchantment. You gain 3 life.

Exile target creature. Return that creature to the battlefield under its owner's control at the beginning of the next end step.
Rerun (If you cast this from your hand, exile it as it resolves. Whenever a creature you control dies, you may cast this card from exile without paying its mana cost.)

When Felhide Marauder enters, if you control a creature with power greater than its base power, Felhide Marauder gains haste until end of turn.

Target opponent exiles a card from their hand. Scry 2.
Tether (Then if you cast this from your hand, you may exile it tethered to a creature you control. When it dies, you may cast this from exile without paying its mana cost.)

Flying
When Highspire Informant enters, scry 1.

This spell costs {1} less to cast for each instant and sorcery card in your graveyard.
[+1]: Create a 2/2 blue Elemental Illusion creature token with flying and “Whenever this becomes the target of a spell, sacrifice it.”
[–3]: Return up to one other target nonland permanent to its owner's hand. Draw a card.

({T}: Add {G} or {W}.)
As Sunlit Plaza enters, you may pay {1}. If you don't, Sunlit Plaza enters tapped.

First strike
Whenever an opponent casts a spell, Kiboshi's Guardian gains indestructible until end of turn.

Create two 3/1 red and white Goblin Soldier creature tokens with haste. Creatures you control gain indestructible until end of turn.

[+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.