Create a 1/1 white Spirit creature token with flying. If you've cast another instant or sorcery spell this turn, create two of those tokens instead.

Draw two cards.
Escape—{3}{U}{U}, Exile four other cards from your graveyard.

Whenever you draw a card, target player mills a card.
{4}{U}, Sacrifice Dissolve Memory's Hold: Target player mills five cards.

Surveil 2, then draw a card.

When Insight Insignia enters, you may attach it to target creature you control.
Whenever equipped creature deals combat damage to a player, surveil 1, then draw a card.
Equip {U}

Whenever Keeper of Death's Mysteries attacks, exile the top card of each player's library.
Once each turn, you may play a noncreature card exiled with Keeper of Death's Mysteries, and mana of any type can be spent to cast it.
Escape—{4}{U}{U}, Exile six other cards from your graveyard

Whenever you cast an instant or sorcery spell, create an X/X blue Drake creature token with flying, where X is that spell's mana value.
At the beginning of your upkeep, if Drakes you control have total power 8 or greater, draw a card. Then you may cast an instant or sorcery spell from your hand without paying its mana cost.

Flying
When Kywon's Skyhunter enters, draw a card.

Return target creature to its owner's hand.
Escape—{3}{U}, Exile five other cards from your graveyard.

Multitude {5}{U}{U}
Matron of Lost Glades can't be blocked as long as you control another attacking creature.

Target creature can't be blocked this turn.
Draw a card.

When Moonlit Meditation enters, draw three cards, then put two cards from your hand on top of your library.
{1}{U}, Sacrifice Moonlit Meditation: Shuffle up to three target cards from your graveyard into your library.

Choose one. If you've cast another spell this turn, choose any number instead.
• Target spell's owner puts it on the top or bottom of their library.
• Create a token that's a copy of target nonland permanent with mana value 1 or less.
• Return target sorcery card from your graveyard to your hand. Exile Possibility Slips Away.

Flash
When Primordial of Emila Glade enters, return up to two instant and/or sorcery cards from your graveyard to your hand.
Once each turn, you may pay {U} rather than pay the mana cost for an instant or sorcery spell.

Flying
When Prototypical Broodwing enters, choose one —
• Return target creature to its owner's hand.
• Return target instant or sorcery card from your graveyard to your hand.

Surveil 2, then draw two cards.

Counter target noncreature spell. If a planeswalker spell was countered this way, draw a card.

When Revenant of Winter enters, tap target creature you don't control. It doesn't untap during its controller's next untap step.
Escape—{4}{U}, Exile four other cards from your graveyard.

Flash
Rose Court Champion can only attack or block alone.
Whenever you draw your second card each turn, put a +1/+1 counter on Rose Court Champion.

{4}{U}, Sacrifice Scribe of Lost Texts: Return target instant or sorcery card from your graveyard to your hand. This ability costs {2} less to activate for each creature that dealt damage to an opponent this turn.

Whenever Secretkeeper of the Dead enters or you cast another spell from a graveyard, draw a card.
Escape—{5}{U}{U}, Exile five other cards from your graveyard.

Flying
Whenever one or more nontoken Spirits you control attack, create a 1/1 white Spirit creature token with flying.

Put a +1/+1 counter on target creature. It gains hexproof until end of turn.

Choose one —
• Counter target spell unless its controller pays {2}.
• Tap target permanent. If it's a creature, it doesn't untap during its controller's next untap step.

Counter target spell.
Target player mills four cards.