msem-instigator

Spirited (When this creature enters the battlefield, you may activate one of its activated abilities without paying its cost.)
Dragonmaw Wurm enters the battlefield with X +1/+1 counters on it.
{1}{G}, {T}: Target creature you control fights another target creature.

Spirited (When this creature enters the battlefield, you may activate one of its activated abilities without paying its cost.)
{3}{R}: When target creature dies this turn, create a 2/2 red Dragon creature token with flying and “{R}: This creature gets +1/+0 until end of turn.”

Exile any number of target creatures you control, then return those creatures to the battlefield under their owner's control.

Each player returns each instant and sorcery card from their graveyard to their hand. Exile Ebb and Flow.

Vigilance
Each nontoken creature you control gets +1/+1 for each other creature on the battlefield with the same name as it.

Target creature gets +X/+X until end of turn, where X is 3 plus the number of cards named Elemental Power in your graveyard.

Gain control of target creature with mana value 4 or less until end of turn. Untap that creature. It gains haste until end of turn.

Once each turn, when you activate an ability of a permanent you control that isn't a mana ability, you may exile that permanent. If you do, return that card to the battlefield under its owner's control at the beginning of the next end step.

Exile up to three target cards from a single graveyard. Create a tapped 2/2 colorless Spirit creature token.

Reveal the top three cards of your library. For each of those cards, put that card into your hand unless an opponent has Fate in Flames deal 3 damage to them. Then exile the rest.

Fiery Embrace deals X damage to any target, where X is 2 plus the number of cards named Fiery Embrace in your graveyard.

Fire and Ashes deals X damage to any target. If a creature dealt damage this way would die this turn, exile it instead.

Flash
When Fireshaper Adept enters the battlefield, copy up to one target activated or triggered ability. You may choose new targets for the copy.

Target creature you control fights another target creature. If either of those creatures would die this turn, exile it instead.

{T}, Sacrifice Forgewatcher: Add two mana of any one color. If that mana is spent on a creature spell, it gains haste until end of turn.

{B}{R}, Sacrifice a creature: Create a token that's a copy of Forlorn Companion, except it has no mana cost.

Enchant creature
Enchanted creature gets -1/-1 and can't block.
Enchanted creature gets an additional -1/-1 for each card named Garrote in your graveyard.

Whenever one or more creatures you control attack, create a 1/1 white Human Samurai creature token.

When Ginjiro Chimei enters the battlefield, you may search your library for a card with an activated ability, put it into your graveyard, then shuffle.
You may cast Ginjiro Chimei from your graveyard by paying 2 life in addition to paying its other costs.

Counter target spell. If that spell is countered this way, put it on the bottom of its owner's library instead of into that player's graveyard.

Spirited (When this creature enters the battlefield, you may activate one of its activated abilities without paying its cost.)
{U}, {T}: You may tap or untap target Human.

Menace
Spirited (When this creature enters the battlefield, you may activate one of its activated abilities without paying its cost.)
{3}{R}: Another target creature you control gains menace until end of turn.

You may have Hero of Shengin Province assign its combat damage as though it weren't blocked.
{2}{G}: Until end of turn, you may have creatures you control assign combat damage as though they weren't blocked. Activate only if Hero of Shengin Province is in your graveyard.

When Hinode, the Sacred Summit enters the battlefield, draw a card, then choose a creature card name.
Creatures you control with the chosen name have flying, vigilance, and lifelink.

Whenever a creature dies, exile it.
Hiroto Jaakuna has all activated abilities of creature cards exiled with Hiroto Jaakuna.