msem-instigator

[+1]: Create a 1/1 blue Elemental creature token with flying, then crystallize twice. (Put a +1/+1 counter on a creature you control or create a Treasure.)
[–3]: Exile target nonland permanent. As long as it's exiled, its owner may pay {W}{U}{B}{R}{G} as a sorcery to put it into their hand.
[–7]: You get an emblem with “Pay 1 life: Add one mana of any color.” Then you gain 100 life.

When Repurposed Custodian enters, shuffle any number of target cards from graveyards into their owner's libraries.

As long as there are three or more creature cards in your graveyard, Returned Minotaur gets +1/+1 and has menace.

Ward {2}
When Rewriter of Flesh enters, target creature you control becomes an enchantment and loses all other card types. (It still has its abilities, but it's no longer a creature.)

Enchant creature you control
When Rise of Heroes enters or enchanted creature dies, search your library for a creature or planeswalker card with mana value 3 or less, reveal it, put it into your hand, then shuffle.
Enchanted creature gets +1/+1 for each creature and/or planeswalker you control.

Until end of turn, target creature gains deathtouch and “When this creature dies, return it to the battlefield tapped under its owner's control with a +1/+1 counter on it.”

Gain control of target creature until end of turn. Untap that creature. Then create two 1/1 red Satyr creature tokens with “This creature can't block.” Creatures you control gain haste until end of turn.

Trample
Each opponent can cast spells only any time they could cast a sorcery.
Auras you control attached to other permanents you control also enchant Sacred Lynx if able.

Flying
When Sage of Dilemmas enters, return up to one target enchantment to its owner's hand.

Augmented — At the beginning of combat on your turn, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, untap up to one target land you control. It becomes a 4/4 Elemental creature that's all colors and gains haste and vigilance until end of turn. It's still a land.
{T}: Untap target land. It gains all basic land types until end of turn.

Chronicle (As this enters and after your draw step, add a lore counter. Stop after III.)
[Lore I-II] Create a 1/1 red Satyr creature token with “This creature can't block.”
[Lore III] Creatures you control get +1/+0 until end of turn.

At the beginning of combat on your turn, if you control a creature with power greater than its base power, Satyr Trailblazer gets +2/+0 until end of turn.

Heroic — Whenever you cast a spell that targets Satyr Vigormage, choose one —
• Put a +1/+1 counter on Satyr Vigormage.
• Satyr Vigormage fights target creature you don't control.
• Search your library for a land card, reveal it, put it into your hand, then shuffle.

When Savagery Evergrowing enters, create two 3/2 green Horror creature tokens.
Whenever a Horror you control dies, put a +1/+1 counter on each Horror you control.

Whenever you cast a spell, if mana from an artifact was spent to cast it, exile the top card of your library. You may play that card until you exile another card with Savant of Cables.

When Scanning Module enters, crystallize. (Put a +1/+1 counter on a creature you control or create a Treasure.)
Equipped creature gets +1/+1.
Equip {1}

When Scrying Pool enters, scry 2.
{1}, {T}: Add one mana of any color.

Augmented — At the beginning of combat on your turn, if you've spent {W}{U}{B}{R}{G} to cast spells this turn, put a +1/+1 counter on Second Wave Explorer.

Mill four cards, then return a creature or enchantment card from your graveyard to you hand. You gain 3 life.

Serpentine Woods enters tapped.
{T}: Add {B} or {G}.
{2}{B}{G}, {T}, Sacrifice Serpentine Woods: Draw a card.

Chronicle (As this enters and after your draw step, add a lore counter. Stop after III.)
[Lore I-II] Mill two cards.
[Lore III] Return target creature card from your graveyard to your hand.

Equipped creature gets +2/+2 and has ward {2} and “Whenever this creature attacks, draw a card, then you may put a land card from your hand onto the battlefield.”
Equip {2}

Heroic — Whenever you cast a spell that targets Setessan Avenger, create a 1/1 green Nymph Dryad enchantment creature token with “{T}: Add {G}.”
Whenever Setessan Avenger deals combat damage to a player, untap all lands and Dryads you control.

Sheltered Haven enters tapped.
{T}: Add {G} or {W}.
{2}{G}{W}, {T}, Sacrifice Sheltered Haven: Draw a card.

Whenever you scry, put a +1/+1 counter on Shimmershell.