Wizard's Spellbook [Dungeons & Dragons: Adventures in the Forgotten Realms]

Set: Dungeons & Dragons: Adventures in the Forgotten Realms Type: Artifact Rarity: Rare Cost: {5}{U}{U} {T}: Exile target instant or sorcery card from a graveyard. Roll a d20. Activate only as a sorcery.1-9 | Copy that card. You may cast the copy.10-19 | Copy that card. You may cast the copy by paying {1} rather than paying its mana cost.20 | Copy each card exiled with Wizard's Spellbook. You may cast any number of the copies without paying their mana costs.