Creature — Human Pirate
3 / 1
When this creature enters, create a Treasure token. (It's an artifact with "

, Sacrifice this token: Add one mana of any color.")
Whenever you sacrifice a token, this creature gains flying until end of turn.
If a blocked creature gains flying after blockers are declared, it won't cause that creature to become unblocked, even if the blocking creature doesn't have flying or reach.
Burdened Aerialist's ability will trigger whenever you sacrifice a token for any reason, not just when you sacrifice Treasure tokens.