msem-instigator

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

Flash
Flying
When P05 Suppressor enters, create a Function token with “Tap target creature. Put a stun counter on it.” (It's an enchantment. As you cast an instant or sorcery spell, sacrifice any number of Functions to add their effects to that spell.)

Flash
Flying
Whenever you cast another spell with flash or an instant, conjure a card named Data-Point into your hand. (It's a sorcery that costs {2} with “Draw a card.”)

Flash
Flying
Whenever you cast another spell with flash or an instant, put a stun counter on up to one target creature if it's tapped. Otherwise, tap it.

Enchant creature
Enchanted creature gets +1/+1 and has flying and indestructible.
At the beginning of your upkeep, sacrifice a creature.

Flying

When Palace Vanguard enters, choose one —
• Create a 1/1 blue Bird creature token with flying.
• Create a 2/2 white Cat creature token.

Flying
Whenever Pale Courier deals combat damage to a player, it voyages. (If it isn't blocking or targeted by another spell or ability, it phases out.)
Whenever Pale Courier phases in, create a 1/1 white Dwarf creature token.

Return target creature card from your graveyard to the battlefield. That creature is a black Elemental in addition to its other colors and types. Upgrade it. (Give it one of the listed counters it doesn't already have.)
• +1/+1
• Flying
• Lifelink

Flying
When Palloren Vulture enters, each player mills two cards.

Flying
Other creatures get -1/-1.
Whenever Pan Long enters or deals combat damage to a player, return to the battlefield under your control target creature card from a graveyard that was put there from the battlefield this turn.

Flash
As long as Panya and exactly one other creature are attacking, both have flying.

Whenever Panya attacks, you may put an escapade counter on her, then you may cast an instant or sorcery card from your hand with mana value equal to the number of escapade counters on Panya without paying its mana cost.
{1}{U}: Panya gains flying until end of turn.

Exile target creature. If you controlled that creature, create a 4/4 red Dragon creature token with flying. Otherwise, its controller creates a 1/1 white Bird creature token with flying.
Showcase {4}{U} (Then if you cast this for its showcase cost, create a 1/1 red Bard creature token that can't block and exile this. Whenever it attacks, you may cast a free copy of this.)

Colossal 2—{5}{G}{U} (You may cast this for its colossal cost to have it enter with two +1/+1 counters; or pay {5}{G}{U} as a sorcery: Put two +1/+1 counters on it if it has none.)
Flying
Each creature you control with a counter on it has vigilance and “{T}: Add one mana of any color.”

Parasol Twirler has flying as long as you control an artifact.

At the beginning of combat on your turn, amass Soldiers 1. (Put a +1/+1 counter on an Army you control. It's also a Soldier. If you don't control one, create an 0/0 black Soldier Army creature token first.)
Armies you control have flying and lifelink.

Prismatic — Whenever you cast a multicolored spell, create a 1/1 blue Bird creature token with flying. It gains haste until end of turn.
Whenever three or more creatures you control deal combat damage to a player, draw a card.

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

Flying
Whenever you foretell a card or cast a foretold spell, each opponent loses 3 life unless they sacrifice a creature or discard a card.

Flying
At the beginning of your upkeep, reveal the top card of your library. If it's a creature card, create a 1/1 blue Bird creature token with flying.

Flying, lifelink

Flying

Flying
When Percy's Messenger enters, you gain 2 life. You may put a lore counter on a Saga you control.

Perfect Aim deals 5 damage to target creature with flying. When that creature dies this turn, you gain 5 life.