msem-instigator

Oshiruko Whisperwalker can't be blocked except by Rogues.
Whenever a creature is returned to its owner's hand, you may draw a card. If you do, discard a card.

Flying
When Owl of the Seven Stars enters, scry 2.

Patient Optimizer gets +4/+4 as long as it has four or more kinds of counters on it.
Whenever you draw your second card each turn, upgrade Patient Optimizer. (Give it one of the listed counters it doesn't already have.)
• +1/+1
• Flying
• Hexproof
• Prowess

Whenever you cast a spell that doesn't share a color with Pelt Mystic, you may scry 1.

Performer of Winds can't be blocked.
When Performer of Winds enters, remove a counter from up to one target permanent you control.

Flying
Whenever Phantasmal Owl attacks, it gets +1/+1 until end of turn for each other creature you control with flying.

{T}: Plucky Pickpocket voyages. (If it isn't blocking or targeted by another spell or ability, it phases out.)
Whenever Plucky Pickpocket phases in, draw a card, then discard a card.

Flash
Flying
Prodigious Panya has base power and toughness 4/4 during extra turns.

Flash
When Rahit's Prodigy enters, return target instant or sorcery card from your graveyard to your hand, then discard a card.

{T}: Look at the top card of your library. If its mana value is equal to the number of lands you control, you may reveal it and draw a card.
{1}, Return a land you control to its owner's hand: Scry 1.

Whenever a Survivor you control enters, you may draw a card. If you do, discard a card.

Slipstream (This creature can't be blocked as long as only creatures with slipstream are attacking.)
Shimmer (Whenever this creature attacks, create a tapped and attacking token that's a copy of it. Exile the token at the beginning of the next end step.)

Flying
Whenever Reliya's Construct attacks, it gets +1/+1 until end of turn for each instant or sorcery card in your graveyard.
{U}{U}, {T}, Sacrifice Reliya's Construct: Return target instant or sorcery card from your graveyard to your hand.

Flying, ward {2}
Reliya's Scraphawk gets +1/+1 for each different name among artifact tokens you control.

Protection from Illusions
All cards that aren't on the battlefield, spells, and other permanents are Illusion kindreds in addition to their other types.

Engorge (As this enters, mill three cards, then exile a card from among the milled cards.)
When Risen Looter enters, if it engorged a noncreature, nonland card, draw a card, then discard a card.

When River Miscreants enters, target creature you control can't be blocked this turn.
{2}{U}: Return River Miscreants to its owner's hand. Activate only as a sorcery.

Whenever you cast an instant or sorcery spell, reveal the top card of your library. If an instant or sorcery card is revealed this way, draw a card.

Legendary creatures you control have hexproof.

{1}{U}, {T}, Discard a card: Reveal the top card of your library. Counter target spell unless its controller pays {X}, where X is the mana value of that card.

Improve {1}{U} ({1}{U}: Put a +1/+1 counter on this creature. This costs {1} more to activate for each +1/+1 counter on it. Improve only as a sorcery.)
At the beginning of your end step, if one or more embattled creatures you controlled dealt damage to a player, you may draw a card. (A creature is embattled if it has a counter on it or has a permanent you control attached to it.)

Prowess
{U}: Sage of the Aurora gains flying until end of turn.

Flying
{1}{U}, Sacrifice Scholar's Assistant: Draw a card.

Flying
Dragon spells and Adventure spells you cast cost {1} less to cast.

At the beginning of your upkeep, if six or more cards are in your graveyard, you may transform Scuttling Gnat.