msem-instigator

Trample, ward {1}
Whenever you gain life, put a +1/+1 counter on Unrelenting Noble.
{1}, Sacrifice a permanent: You gain 2 life.

Put a +1/+1 counter on target creature. That creature gains first strike until end of turn.
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 gets +1/+0 for each land you control and gains trample until end of turn.
Orchestrate {1}{G} (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.)

When Clairvoyant Mage enters, scry 2. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

When Runaway Princess dies, audition for white. (Create a 1/1 Construct Actor creature token, a Scout Role giving 2/3 and vigilance, or a Cleric Role giving 2/2 and lifelink. Roles replace older ones.)

Reach
Lupine Skygrazer enters with a +1/+1 counter on it if three or more colors of mana were spent to cast it.

When Ageless Ascetic enters, return up to one target instant or sorcery card from your graveyard to your hand.

When Spoiled Prince enters, each player sacrifices a creature with the greatest power among creatures they control.

When Gemcrusher Turtle enters, choose one —
• Destroy target artifact.
• Gemcrusher Turtle fights up to one target creature.

Choose one. If you control four or more creatures, you may choose any number instead.
• Exile target artifact or enchantment.
• Exile target player's graveyard. Stand as One deals 1 damage to each opponent for each card type among cards exiled this way.
• Target creature you control deals damage equal to its power to target creature or planeswalker.

Haste (This creature can attack and {T} as soon as it comes under your control.)
Quick Brown Fox can't be blocked by Hounds.

When Cave Eel enters, look at the top three cards of your library. Put one on top and the rest on the bottom in any order.

When Unstable Orb enters, draw a card.
{3}, {T}, Sacrifice Unstable Orb: It deals 2 damage to target creature.

Flying
Morph {3}{G}{U} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up any time for its morph cost.)
When Ishim of Tempest is turned face up, put a +1/+1 counter on it, draw three cards, then discard two cards.

Enchant creature
Embody (Enchanted creature is a copy of this card except for its types.)
As long as Legend of the Generous is tapped, other creatures you control get +2/+2.

When Aureate Golem enters, create a Treasure token. Each other player creates a tapped Treasure token. (They're artifacts with “{T}, Sacrifice this artifact: Add one mana of any color.”)

Whenever a Survivor you control enters, scry 1. (To scry 1, look at the top card of your library. You may put that card on the bottom of your library.)

Enchant creature
Enchanted creature gets +1/+1 and has flying and indestructible.
At the beginning of your upkeep, sacrifice a creature.

This spell costs {1} less to cast for each artifact and/or enchantment you control.

Flash
When Colpah Charmer enters, you may tap or untap target creature.

When Saffrisa's Darkcaster enters, look at the top four cards of your library. You may substantiate a card from among them. Put the rest into your graveyard. (To substantiate a card, put it onto the battlefield face down as a 2/2 creature. You may turn it face up and cast it at any time for its mana cost if it isn't a creature.)

When Lisa, the Daughter enters, create Mother, a legendary 4/1 black Demon creature token with flying and “This creature can't block.”
If a source would deal damage to Lisa while you control a Demon creature, instead that damage is dealt to a Demon creature you control of your choice.

Frondpond Prankster can't be blocked.
Whenever Frondpond Prankster enters or deals combat damage to a player, target player reveals their hand, then you choose any number of nonland cards from it. That player puts those cards on the bottom of their library in a random order, then draws that many cards.

Advance {2}{R} (Cast this for {2}{R} to advance it as it enters. {2}{R}: Advance this as a sorcery.)
Haste
Whenever Soulblade Warrior advances, it gets +2/+0 until end of turn.

Permanent spells you cast cost {1} less to cast.
{3}{G}: Choose a counter on target permanent you control, then put another counter of that kind on that permanent or remove that counter from it. Activate only as a sorcery.