Semester's End is a rare Instant card from Commander Masters (CMM), collector number 834. Current market price: $1.27, 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.