Balloon Peddler

{U}, {T}, Discard a card: Target creature gains flying until end of turn.

Arcades, the Strategist

Flying, vigilance
Whenever a creature with defender enters the battlefield under your control, draw a card.
Each creature you control with defender assigns combat damage equal to its toughness rather than its power and can attack as though it didn't have defender.

Rishadan Airship

Flying
Rishadan Airship can block only creatures with flying.

The Prydwen, Steel Flagship

Flying
Whenever another nontoken artifact enters the battlefield under your control, create a 2/2 white Human Knight creature token with "This creature gets +2/+2 as long as an artifact entered the battlefield under your control this turn."
Crew 2

Wily Bandar

{2}{G}: Wily Bandar gains indestructible until end of turn. (Damage and effects that say "destroy" don't destroy it.)

Balloon Stand

Visit — Choose one.
• Create a 1/1 red Balloon creature token with flying.
• Sacrifice a Balloon. If you do, target creature gains flying until end of turn.

Tower Defense

Creatures you control get +0/+5 and gain reach until end of turn.

Stronghold Zeppelin

Flying
Stronghold Zeppelin can block only creatures with flying.