msem-instigator

Flash
When Cocky Bladesinger enters, it gains first strike, lifelink, and haste until end of turn.

As long as Imperial Proclaimer is on the battlefield, it has all names of nonlegendary creature cards in addition to its name.

Deathtouch
When Flesheater Vine enters, you may have it consume. If you do, put a +1/+1 counter on it and you gain 3 life. (To consume, sacrifice another creature or exile a creature card from your graveyard.)

{T}: Add {C}.
{2}{G}, {T}: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.
At the beginning of combat on your turn, if you control ten or more lands, you may pay {3}{G}{G} and exile this land. When you do, untap any number of lands you control. They become 2/2 green Elf creatures with haste in addition to their other types.

Haste
{W}: Fretport's Heedless gains lifelink until end of turn.
At the beginning of your end step, sacrifice Fretport's Heedless.

{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.

{G}{G}: Create a 2/2 green Wolf creature token.
{1}{G}{G}: Create Shimaru, the White Wolf, a legendary 3/3 green Wolf creature token with hexproof.
{2}{G}{G}: Creatures you control get +2/+2 and gain trample until end of turn.

When Avaz Banner enters, attach it to target creature you control.
Equipped creature gets +2/+2 and is a Soldier Army in addition to its other types.
Equip {3}

{2}, {T}, Sacrifice a creature: You draw a card and you lose 2 life.
{1}, {T}, Exile a creature card from your graveyard: You gain 2 life.

Target creature phases out. (Treat it and anything attached to it as though they don't exist until its controller's next turn.)

{T}: Add {C}.
Concord — {T}: Create a Treasure token. Activate only if there are four or more card types among permanents you control.

Choose two —
• Tap target creature.
• Untap target creature.
• Draw a card.

Untap target creature you control. It fights target creature you don't control.

When Soul Jar enters, exile target creature and each other creature with the same name as that creature until Soul Jar leaves the battlefield.

Return target nonland permanent to its owner's hand. If you control an artifact, draw a card.

Other Spirits you control get +1/+1.
As long as a Spirit you control has flying, Soulcleaver has flying. The same is true for first strike, double strike, deathtouch, haste, hexproof, indestructible, lifelink, menace, reach, trample, and vigilance.

Enchant player
At the beginning of your upkeep, enchanted player loses 1 life.

When Poisonous Growth enters, create a 1/1 green Saproling creature token, then attach Poisonous Growth to it.
Equipped creature has deathtouch.
Equip {4}

Deathtouch
Cadence (Whenever you cast a spell, if its mana value is greater than this creature's power, put a +1/+1 counter on this creature.)

Enchant creature
Enchanted creature is a Horror with base power and toughness 3/3 and loses all other creature types and abilities.
Whenever enchanted creature deals combat damage to a creature, create a token that's a copy of Plagas Infestation and attach it to the damaged creature.

Golden age (If you cast an instant or sorcery spell, activated a nonmana ability, and attacked this turn, enter a renaissance for this game.)
Destroy target creature. If you're in a renaissance, you may return a creature card from your graveyard to your hand.

Lifelink
Partner with Imperator Valtasius (When this creature enters, target player may put Imperator Valtasius into their hand from their library, then shuffle.)
At the beginning of your upkeep, return target Soldier card from your graveyard to your hand.

Enchant non-Army creature
When Sinking Pessimism enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.
Enchanted creature has “{4}: Untap this creature. If it untapped this way, put a stun counter on it.”

Vanguard — Whenever a creature you control attacks alone, gain control of target nonland permanent for as long as you control The Rocket Gang Strikes!.

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