Mist Dancer (Extended Art) [The Lost Caverns of Ixalan Commander]

Flying
Other Merfolk you control get +1/+0 and have flying.
Encore 5UU (5UU, Exile this card from your graveyard: For each opponent, create a token copy that attacks that opponent this turn if able. They gain haste. Sacrifice them at the beginning of the next end step. Activate only as a sorcery.)