msem-instigator

Choose one —
• Destroy target artifact or enchantment.
• Search your library for a basic land card, put it onto the battlefield tapped, then shuffle.

Charbroiled Core enters tapped unless you have two or more opponents.
{T}: Add {B} or {R}.

Enchant creature
When Charmed Sleep enters, tap enchanted creature.
Enchanted creature doesn't untap during its controller's untap step.

Chiseled Cliffside enters tapped unless you have two or more opponents.
{T}: Add {R} or {W}.

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.

Circling Predators deals X damage to each creature, where X is 2 plus the number of cards with a cycling ability in your graveyard.
Cycling {2} ({2}, Discard this card: Draw a card.)

Whenever you cast a Rogue spell or a spell from exile, you may return Cobri to her owner's hand.

Pressure {B}{G} (You may cast this spell for its pressure cost if seven or more cards are in your graveyard.)
Search your library and/or graveyard for a creature card with mana value 3 or less and put it onto the battlefield. If you searched your library this way, shuffle.

Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)
Whenever Conchhorn Shinygrabber attacks, you may pay {1}. If you do, create a Treasure token. (It's an artifact with “{T}, Sacrifice this artifact: Add one mana of any color.”)
{W}{U}{B}{R}{G}: Conchhorn Shinygrabber gets +3/+3 and gains lifelink until end of turn.

Spells you cast from exile cost {1} less to cast.

Draw two cards.
Menagerie — If there are five or more creature types among creatures you control, draw three cards instead.

{T}: Conchspear Hunter deals 1 damage to any target. Activate only if you control three or more artifacts.

Creatures you control get +1/+0 until end of turn. (Then exile this card. You may play the land later from exile.)

(Add a quest counter as this enters. Sacrifice after 3.)
Whenever you attack with one or more creatures with power 4 or greater, add a quest counter.
Until end of turn, target creature you control gains trample and “Whenever this creature deals combat damage to a player, put a +1/+1 counter on it.”
Put two +1/+1 counters on target creature you control. It fights up to one target creature you don't control.

Look at the top card of your library. You may put it into your graveyard. Repeat this process twice, then draw a card.

Concord — When Coral Bruiser enters, if there are four or more card types among permanents you control, put target creature you don't control into its owner's library third from the top.

Enchant creature
Concord — When Coral Guidance enters, if there are four or more card types among permanents you control, draw a card.
Enchanted creature doesn't untap during its controller's untap step.

Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)
Cycling {U} ({U}, Discard this card: Draw a card.)

Vigilance, trample
Whenever you draw your second card each turn, put a +1/+1 counter on Coralblade Cohort.
Cycling {G} ({G}, Discard this card: Draw a card.)

Exile target creature with power 4 or greater.
Create a Treasure token. (It's an artifact with “{T}, Sacrifice this permanent: Add one mana of any color.”)

You may play Coralight Castle from your graveyard as long as seven or more cards are in your graveyard.
Coralight Castle enters tapped.
{T}: Add {W} or {U}.
Cycling {1}{W}{U} ({1}{W}{U}, Discard this card: Draw a card.)

When Coralight Champion enters, create a white Aura enchantment token named Hila's Favor attached to target creature. The token has enchant creature and “Enchanted creature has double strike as long as there's another Aura attached to it. Otherwise, it has first strike.”

{3}{W}: Tap target creature. Activate only during your turn.

Concord — When Coralight Communer enters, if there are four or more card types among permanents you control, draw a card.

Flash
When Coralight Lifebloom enters, create a green Aura enchantment token named Kelpcrown attached to target creature you control. The token has enchant creature and “Enchanted creature has hexproof.”