msem-instigator

Destroy each creature with power 3 or greater.

Trample
Whenever Lava Hellions attacks, you may have it consume. If you do, it deals 2 damage to defending player. (To consume, sacrifice another creature or exile a creature card from your graveyard.)

When Dark Apprentice enters, mill three cards, then return a creature card from your graveyard to your hand.

Trample
When Hunted Sprareos dies, create a 6/6 green Wurm creature token with trample.

When Nettlehowler enters, exile up to one target card from a graveyard.
If a creature dealt damage by Nettlehowler this turn would die, exile it instead.

Enchant creature
Enchanted creature gets +2/+2.
Enchanted creature has hexproof as long as it's tapped.

When Wondering Oaf dies, return target instant or sorcery card from your graveyard to your hand.

Whenever you activate one of Ai's loyalty abilities, create a 2/2 colorless Soldier artifact creature token with that ability, except it costs +1 to activate.
[+1]: Ai deals 1 damage to target player or planeswalker. You gain 1 life.
[–3]: Draw a card. You lose 1 life.
[–7]: Each opponent sacrifices a permanent and discards a card.

Defender
Phyten Bodyguards can attack as though it didn't have defender as long as you control three or more creatures.

Deathtouch, lifelink
When Emperor Azuma Hashiro enters, gain control of target creature for as long as you control Emperor Azuma Hashiro.
At the beginning of your upkeep, each opponent loses life equal to the number of permanents you control but don't own.

(Add a quest counter as this enters. Sacrifice after 3.)
Whenever you draw your second card each turn, add a quest counter.
1, 2 — Scry 3.
3 — Create a blue and green enchantment token named The Heart with “Whenever you tap a land for mana, add one mana of any color.”

As Fortified Village enters, you may reveal a Forest or Plains card from your hand. If you don't, Fortified Village enters tapped.
{T}: Add {G} or {W}.

Reach, trample
Whenever this creature transforms into Flourishing Companion or attacks, untap all lands you control.

Up to two target creatures can't block this turn.
Draw a card.

Spells you cast that target Risti Operative cost {1} less to cast.
Abilities you activate that target Risti Operative cost {1} less to activate.

When Woopip Wanderer enters, create two colorless artifact tokens named Lotus Petal with “{T}, Sacrifice this artifact: Add one mana of any color.”
{2}{G}: Germinate. (Put a +1/+1 counter on a creature or create a 1/1 green Saproling creature token.)

First strike
Art of war — At the beginning of your end step, if Teikoku Cavalry dealt damage to an opponent this turn, put a +1/+1 counter on it.

If you would draw one or more cards, you may have each player draw an additional card.
Spells cost {1} less to cast if a player cast a spell this turn.

{T}: Add {C}.
{T}, Pay 1 life: Add {B}.
{B}, {T}: Add one mana of any color.

Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)
{T}: Salvage a creature card. (Exile one from your graveyard until this creature leaves the battlefield. Whenever this creature deals combat damage to a player, put a card it salvaged into your hand.)

Enchant creature
Enchanted creature has “{T}: Add one mana of any color. Put a +1/+1 counter on this creature.”

Flying
Whenever you aetherize, you may have Telarine Skychaser become an artifact creature until end of turn.
Crew 3 (Tap any number of creatures you control with total power 3 or greater: This Vehicle becomes an artifact creature until end of turn.)

When Death Pits Trophy enters, target opponent discards a card.
Equipped creature gets +1/+1.
Equip {1}

If a source would deal damage to you or a permanent you control this turn, prevent all but 1 of that damage.
Metamorph {1}{W} (You may cast this card face down as a 2/2 creature for {3}. Turn it face up and cast it at any time for its metamorph cost.)

When Restoration Effort enters, draw a card.
Sacrifice Restoration Effort: Gain life equal to target creature you control's power.