Adaptive Training Post is a rare Artifact card from Tarkir: Dragonstorm Commander (TDC), collector number 18. Current market price: $0.23, TCGplayer market prices via Scryfall.
Whenever you cast an instant or sorcery spell, if this artifact has fewer than three charge counters on it, put a charge counter on it. Remove three charge counters from this artifact: When you next cast an instant or sorcery spell this turn, copy it and you may choose new targets for the copy.