Scroll of the Masters is a rare Artifact card from The List (PLST), collector number FRF-163. Current market price: $0.38, TCGplayer market prices via Scryfall.
Whenever you cast a noncreature spell, put a lore counter on this artifact. {3}, {T}: Target creature you control gets +1/+1 until end of turn for each lore counter on this artifact.