Aerial Boost is a common Instant card from March of the Machine (MOM), collector number 2. Current market price: $0.20 (foil $0.21), TCGplayer market prices via Scryfall.
Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) Target creature gets +2/+2 and gains flying until end of turn.