msem-instigator

{T}: Tap target creature with power less than or equal to Charmer of the Folded Fan's toughness.

Equipped creature gets +2/+1.
Equipped creature has first strike as long as it's attacking.
Whenever a Knight or Soldier you control attacks, you may attach Chevalier's Lance to it.
Equip {3}

Cast this spell only if an opponent controls two or more nonwhite creatures or you control six or more lands.
Create X 1/1 white Bird creature tokens with flying. You gain X life.

When Chiseled Familiar enters the battlefield, draw a card.
Sacrifice Chiseled Familiar: You gain 2 life.

Concord — Whenever Chitinborn Sentry attacks, if there are four or more card types among permanents you control, prevent all damage that would be dealt to target attacking creature this turn.

{T}: Target creature loses all abilities until end of turn. Exile Chochin the Silent Moth and that creature.

Enchant creature
When Chords of Order enters the battlefield, put a +1/+1 counter on enchanted creature.
Whenever enchanted creature attacks, tap up to one target creature without a +1/+1 counter on it, then untap up to one target creature with a +1/+1 counter on it.

(Choose only one work as a sorcery to add its ability.)
When Chronicles of the Kitsune enters the battlefield, create a 2/1 red and white Fox creature token.
{2}{W}{W}: Act I: Ascent
Creature tokens you control get +1/+1 and have flying.
{3}{W}{W}: Act II: Descent
At the beginning of your end step, if you control no creatures, create Hu Li, a legendary 4/4 white Fox Spirit creature token with flying and lifelink.

Flying
Whenever Circumspect Flock perseveres, create a 1/1 white Bird creature token with flying. (A creature perseveres when it survives damage.) (A creature perseveres when it survives damage.)

When Citywide Automation enters the battlefield, create two 1/1 colorless Construct artifact creature tokens.
{2}{W}{W}, Sacrifice Citywide Automation: Creatures you control get +1/+1 until end of turn. Activate only as a sorcery.

Whenever another creature enters the battlefield under your control, you gain 1 life.
{4}{W}: Return another target creature you control to its owner's hand.

Target creature you control gains protection from everything until end of turn.

This spell costs {1} less to cast for each creature you attacked with this turn. (Those creatures don't have to still be on the battlefield.)
Flying

{W}, {T}: Tap target creature.

Puzzlebox (Begin the game with this and another card you own from outside the game in the command zone, locked. That card is face down until you unlock this.)
Tap four untapped creatures you control: Unlock Clockwork Astrolarium. If the revealed card is white, put it into your hand. Otherwise, put it on top of your library.

When Cloister enters the battlefield, exile another target nonland permanent you control and target nonland permanent you don't control until Cloister leaves the battlefield.
{2}{W}, Sacrifice Cloister: You gain 5 life.

Stampede — Whenever Cloud's Roar Avenger and a creature with greater power attack, tap up to one target creature.

Flying
When Cloudchaser Kestrel enters the battlefield, destroy target enchantment.
{W}: Target permanent becomes white until end of turn.

Flying
When Cloudheath Sentinel enters the battlefield, return target artifact card with mana value 2 or less from your graveyard to the battlefield.

Flying, lifelink
When Cloudshaper Pilgrim enters the battlefield, return target creature or enchantment card with mana value 3 or less from your graveyard to your hand.

When Coalition Apothecary enters, you gain 1 life for each nonland permanent you control.

Target creature you control gains hexproof and indestructible until end of turn. If it's a Knight or Soldier, put a +1/+1 counter on it.

When Coercive Cardinal enters the battlefield, choose an opponent. That player may have you gain 5 life. If the player doesn't, create two 1/1 white Cleric creature tokens.

Equipped creature gets +1/+1 and has vigilance.
Equip {1}