Seascape Aerialist

Voltigeur marosophe (Seascape Aerialist) (fr)

Creature - Merfolk Wizard Ally | Power/Toughness: 2 / 3 (CMC 5)
Whenever Seascape Aerialist or another Ally enters the battlefield under your control, you may have Ally creatures you control gain flying until end of turn.