Rite of Harmony is a rare Instant card from Innistrad: Midnight Hunt Promos (PMID), collector number 236p. Current market price: $1.36 (foil $1.20), TCGplayer market prices via Scryfall.
Whenever a creature or enchantment you control enters this turn, draw a card. Flashback {2}{G}{W} (You may cast this card from your graveyard for its flashback cost. Then exile it.)