Rod of Absorption is a rare Artifact card from Forgotten Realms Commander (AFC), collector number 19. Current market price: $0.47, TCGplayer market prices via Scryfall.
Whenever a player casts an instant or sorcery spell, exile it instead of putting it into a graveyard as it resolves. {X}, {T}, Sacrifice this artifact: You may cast any number of spells from among cards exiled with this artifact with total mana value X or less without paying their mana costs.