msem-instigator

Trample
When Arpechian Bellowers enters the battlefield, harmonize. (Trigger up to one harmony of a permanent you control.)
Harmony — Search your library for a green creature card, reveal it, put it into your hand, then shuffle.

Trample
Arpechian Champion can only attack or block alone.
Whenever a land enters the battlefield under your control, put a +1/+1 counter on Arpechian Champion.

Lands you control have hexproof.
{2}{G}{U}: Rouse 2. (Distribute two +1/+1 counters among permanents you control. If they aren't creatures, tap them and they become 0/0 creatures in addition to their other types.)

When Arpechian Stag enters the battlefield, create a 3/3 red Elk creature token with haste, a 3/3 green Elk creature token with trample, and a 3/3 white Elk creature token with vigilance.

Trample
When Arpechian Yatte enters the battlefield, put a +1/+1 counter on each other creature you control.
Whenever another creature enters the battlefield under your control, put a +1/+1 counter on Arpechian Yatte.

Deathtouch
Whenever another creature dies, you get a glory counter. (You lose glory counters before life. A player with ten or more glory counters wins the game.)
{4}{B}, {T}: Destroy target creature and Arrogant Entrant.

Double strike
Renown 2 (When this creature deals combat damage to a player, if it isn't renowned, put two +1/+1 counters on it and it becomes renowned.)

Arsenal Curator gets +1/+1 as long as you control a Plains.
{2}{W}: Untap target creature you control. It gets +0/+1 until end of turn.

{T}: Add {C}.
Harmony — Add one mana of any color.
{1}, {T}: Harmonize. (Trigger up to one harmony of one permanent you control.)

Exile up to two target permanents you control, then return those cards to the battlefield under your control.

Draw two cards. You may cast an instant or sorcery spell with mana value X or less from your hand without paying its mana cost, where X is the number of cards in your hand.

Counter target spell unless its controller pays {1}. If you control an artifact, instead counter that spell unless its controller pays {4}.

Create a 1/1 colorless Construct artifact creature token. If you control six or more artifacts, create a 6/6 colorless Golem artifact creature token instead.
Draw a card.

When Artillery Mage enters the battlefield, it deals 5 damage to target creature you don't control.
{5}{R}, {T}, Discard a card: Artillery Mage deals 5 damage to target creature you don't control.

Whenever you cast a noncreature spell, creatures you control get +1/+0 until end of turn.

Sabotage — Whenever an opponent or permanent an opponent controls becomes the target of a spell you control, Artisan of Brutality gets +2/+0 and gains first strike until end of turn.

Flash
When Artisan of Marrow enters the battlefield, exile another target creature until Artisan of Marrow leaves the battlefield.

{T}: Draw a card. Artisan's Fountain doesn't untap during its controller's next untap step.

Flying
Clerics you control are Angels in addition to their other types.
Attacking Angels you control get +1/+0.

Flying
Clerics you control are Demons in addition to their other types.
Attacking Demons you control have deathtouch.

Flash
When Ascetic of Imbalance enters the battlefield, draw two cards, then discard two cards. If you discarded two cards that don't share a type, Ascetic of Imbalance deals 2 damage to any target.

Flying
When Ascetic of the Folded Fan enters the battlefield, create an Idol token. (It's an artifact with “{1}, Sacrifice this artifact: Put a +1/+1 counter on target creature. Activate only as a sorcery.”)
Each creature you control with a +1/+1 counter on it has vigilance.

Whenever you cast an Inscription spell, you may choose target creature you control. If you do, as that Inscription resolves, exile it inscribed onto that creature instead of putting it anywhere else.

Equipped creature gets +2/+2.
Art of war — At the beginning of your end step, if equipped creature dealt damage to an opponent this turn, target nonbasic land an opponent controls doesn't untap during its controller's next untap step.
Equip {2}

Whenever Ashen Host becomes the target of a spell, Ashen Host deals 2 damage to any target.