msem-instigator

Return target creature card with mana value 3 or less from your graveyard to the battlefield. If its mana value is less than 3, you gain life equal to the difference.

Exile target creature you control, then return that card to the battlefield under its owner's control. 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.”)

This spell costs {W} less to cast if it targets a black or red permanent.
Exile target nonland permanent with mana value 3 or less.

Choose one or both —
• Put a +1/+1 counter on each of up to two target creatures.
• Put a +1/+1 counter on up to one target Elemental and up to one target Soldier.

Vanguard — Whenever a creature you control attacks alone, put a +1/+1 counter on it.

Colorless creatures you control get +1/+1.

When Ontarachie Envoy enters the battlefield, nourish, then germinate. (To nourish, put a +1/+1 counter on this creature or create a 1/1 white Citizen creature token. To germinate, put a +1/+1 counter on a creature you control or create a 1/1 green Saproling creature token.)

If you would germinate, instead create a 1/1 green Saproling creature token, then put a +1/+1 counter on a creature you control.
{2}{W}{W}: Germinate. (Put a +1/+1 counter on a creature or create a 1/1 green Saproling creature token.)

When Onward to War enters the battlefield, draw a card, then choose a card name.
Whenever one or more creatures you control with the chosen name attack, look at the top four cards of your library. Put a creature or enchantment card with mana value 3 or less from among them into your hand. Put the rest on the bottom of your library in any order.

For each nonland token you control, create a token that's a copy of it.

Converge — When Operations Manager enters the battlefield, create X 1/1 colorless Servo artifact creature tokens, where X is the number of colors of mana spent to cast Operations Manager.

Lifelink
Whenever Operative BABY attacks or you cast a black or red spell, create a 1/1 blue Elemental creature token with flying.

Enchant creature
Enchanted creature can't attack or block unless its controller pays {3}.
Activated abilities of enchanted creature cost {3} more to activate.

Creatures can't attack you unless their controller pays {3} for each of those creatures.

When Opulent Proprietor enters the battlefield, you may search your library and/or graveyard for an Aura, Aurashaper, Equipment, or Vehicle card, reveal it, and put it into your hand. If you search your library this way, shuffle.

(Activate each submodule once as a sorcery. When this enters, activate one submodule for free.)
{W}{W}{W}: Purpose
Create three 1/1 white Spirit creature tokens with flying.
{W}{W}{W}: Justice
Exile target nonland permanent you don't control until Order Module leaves the battlefield.
{W}{W}{W}: Unity
Order Module gains “Creatures you control get +1/+1.”

Identity — When Order's Anointer enters the battlefield, if you control at least two other creatures that share a creature type with it, creatures you control get +1/+1 until end of turn.

Oreskos Warden has lifelink as long as you control an enchantment.

{2}{W}: Ornate Legionnaire gains first strike until end of turn.

Flying, vigilance
Orzhov Benefactor can't attack or block unless you pay {1} for each debt counter on it.
At the beginning of your upkeep, put a debt counter on Orzhov Benefactor.
{2}: Remove a debt counter from Orzhov Benefactor.

Whenever you make first contact, Oscuran Wingmate gains flying until end of turn. (You make first contact the first time each turn you cast a spell with a name not in your graveyard or control already.)

Exile target nontoken permanent you control, then return that card to the battlefield under its owner's control.

When Oshiruko Purifier enters the battlefield, create a 2/2 colorless Spirit creature token.
Colorless creatures you control have lifelink.

Distorted (This creature can be blocked by tapped creatures but not untapped creatures.)

Distorted (This creature can be blocked by tapped creatures but not untapped creatures.)
Oslyd Heretic gets +1/+1 as long as you control no other creatures.