Rionya, Fire Dancer is a rare Legendary Creature — Human Wizard card from Commander 2021 (C21), collector number 382. Current market price: $8.48, TCGplayer market prices via Scryfall.
At the beginning of combat on your turn, create X tokens that are copies of another target creature you control, where X is one plus the number of instant and sorcery spells you've cast this turn. They gain haste. Exile them at the beginning of the next end step.