When Burdened Aerialist enters the battlefield, create a Treasure token. Whenever you sacrifice a token, Burdened Aerialist gains flying until end of turn.
2021-06-18
Burdened Aerialist's ability will trigger whenever you sacrifice a token for any reason, not just when you sacrifice Treasure tokens.
2021-06-18
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.