Semester's End is a rare Instant card from Strixhaven: School of Mages Promos (PSTX), collector number 27p. Current market price: $1.58 (foil $2.14), TCGplayer market prices via Scryfall.
Exile any number of target creatures and/or planeswalkers you control. At the beginning of the next end step, return each of them to the battlefield under its owner's control. Each of them enters with an additional +1/+1 counter on it if it's a creature and an additional loyalty counter on it if it's a planeswalker.