msem-instigator

Flying
Whenever you cast your first noncreature spell each turn, create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)

Flying, vigilance, lifelink
Idyllic Pegasus gets +1/+0 for each artifact and/or enchantment you control.

Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.)
As long as Daring Cavalier is renowned, it has trample.

(Transform this if it's not attached to a creature. Pay {G} as a sorcery to unattach it.)
Enchant creature you control
When this permanent transforms into Packbond Mount, move all +1/+1 counters from it to its rider.
Packbond Mount's rider gets +1/+1.
{2}{G}: Put a +1/+1 counter on Packbond Mount's rider.

Each creature with a law counter on it can't attack or block.
{2}{W}, {T}: Remove all law counters from all permanents, then put a law counter on target creature.

{T}: Add {G} or one mana of any color among cards in your graveyard.

Flying

Converge — Glitch enters with an additional loyalty counter on her for each color of mana spent to cast her.
[+1]: Create two 1/1 blue Elemental creature tokens with flying.
[–3]: Draw two cards. When you do, Glitch deals damage to any target equal to the number of cards in your hand.
[–10]: Destroy all lands, enchantments, and artifacts you don't control.

Menace
When OM-6 Walker dies, OM-6 Walker deals damage to each player equal to twice the number of nonbasic lands that player controls.

Target creature blocks this turn if able. You may have it gain reach until end of turn.
Draw a card.

Exile any number of target artifacts and/or enchantments you control, then return them to the battlefield under your control.

Spells your opponents cast this turn cost {1} more to cast. (Then exile this card. You may cast the creature later from exile.)

When Helicos Aberration enters, forebode. (Create a tapped colorless Omen artifact token with “{T}, Discard a card, Sacrifice this artifact: Draw a card.”)

{2}{B}, Sacrifice a creature: Draw a card. You gain 1 life.

Destroy target non-Gorgon creature. Scry 1.

Trample
Whenever a creature dies, put a +1/+1 counter on Venomclaw Skitterer. You gain 1 life.

Search your library for a card, exile it face down, then shuffle. For as long as that card remains exiled, you may cast it. It costs {2} more to cast this way if you don't control a legendary creature as you cast that spell.

Flying, haste
Whenever Epoch Warden attacks, you may aetherize another target attacking creature you control. (To aetherize, create a token that's a copy of it, then exile that token.)

Whenever a creature in Water Sutra Daoshi's pack dies, return a creature card with lesser mana value than that creature from your graveyard to your hand. (Two or more creatures you control with equal power are in a pack.)

First strike, vigilance
Whenever Asamund, Queen of Yroncaster deals combat damage to a player, choose a number. That player can't cast noncreature spells with mana value equal to the chosen number until the end of your next turn.

Until end of turn, target blocked creature you control gains trample and “Whenever this creature deals combat damage to a player, draw that many cards.”

Enchant opponent
Enchanted player plays with the top card of their library revealed.
Whenever enchanted player casts a spell, you may have them mill a card.

Enchant creature you control
When Heliod's Benefaction enters, scry 2.
Enchanted creature gets +1/+1 and has lifelink.

Flying
Whenever Pledged Griffin attacks, another target attacking creature gains flying until end of turn.