msem-instigator

When Sensational Festivities enters or at the beginning of your upkeep, you may draw a card. If you do, each opponent may draw a card, then discard a card.

Untap all permanents you control during each other player's untap step.

{2/U}, {T}: Target creature gets -4/-0 until end of turn.

Choose one —
• Untap each creature you control.
• Harmonize twice. (To harmonize, trigger up to one harmony of a permanent you control.)

Target noncreature artifact you control becomes a 0/0 artifact creature. Put three +1/+1 counters on it.

Enchant creature
Enchanted creature doesn't untap during its controller's untap step.
{2}{U}: Return Sequester to its owner's hand.

When Serafina's Gift enters, if you cast it, target opponent gains control of it.
At the beginning of your upkeep, draw three cards, then discard two cards.

Draw two cards. If you control an Angel, draw three cards instead.

Serene Hart can't be blocked by creatures with power 4 or greater.

Defender (This creature can't attack.)
Whenever you cast a spell, if it isn't your main phase, Serene Meditant loses defender until the beginning of your next end step.

Enchant creature
Enchanted creature doesn't untap during its controller's untap step unless its controller controls no other creatures.

Encourage ({T}: Another target creature you control gets +1/+1 until end of turn. Encourage only as a sorcery.)
Whenever Serul Cove Escort encourages a creature, that creature gains flying until end of turn.

Whenever you cast a Tale, exile target creature an opponent controls until its owner pays {2}. (It enters under its owner's control.)

This spell can't be countered.
Flying, protection from cryptic
Whenever you cast a cryptic spell, cast a Sphinx spell, or draw a card, investigate.
{T}, Sacrifice ten Clues: You win the game.

Flash
Menagerie — When Seven Seas Scourge enters, if there are five or more creature types among creatures you control, counter target spell with mana value 4 or less.

Whenever an artifact is put into your graveyard from the battlefield, you may draw a card. If you do, discard a card.
{T}, Exile three noncreature cards from your graveyard: Create a 1/1 colorless Construct artifact creature token.

(Transcend as a sorcery to gain that type and a +1/+1 counter.)
Ward {2}
{2}{U}: Demigod — Exchange a card in your hand and a noncreature, nonland card in your graveyard.
{6}{U}: God — Exchange control of two target permanents that share a card type.

Shadow Courier can't be blocked.

When Shaidostan Cryoforger enters, exile the top card of your library.
When Shaidostan Cryoforger dies, you may put the exiled card into your hand.

Look at the top three cards of your library. Put one of them into your hand, one on top of your library, and one on the bottom of your library.
Reprise {1}{U} (As you cast an instant or sorcery spell, you may exile one card with reprise from your graveyard and pay its reprise cost. If you do, add its effects to that spell.)

You may have Shaper of the Formless enter as a copy of any creature on the battlefield, except it has “{2}{U}: Target face-down creature becomes a copy of this creature until end of turn. Turn that creature face up. At the beginning of the next cleanup step, turn it face down.”

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Whenever you cast a noncreature spell, 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.”)

Flying
Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)
Spell you cast cost {1} less to cast as long as it's not your turn.

Flying
When Sharp-Eyed Wingmate enters, you may return target creature to its owner's hand.

Return each nonland permanent you don't control to its owner's hand.
Coalesce {6}{U}{U}{U} (You may cast this from your graveyard for {6}{U}{U}{U}. If you do, it enters as a Horror creature after it resolves. Exile it if it would leave the battlefield or not resolve.)
Hexproof (This creature can't be the target of spells or abilities your opponents control.)