: 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 teh copy by paying 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.