Tower of the Cabal

{t}: Add {c}.
{2}{b/g}{u/r}, {t}: Copy target instant or sorcery spell.
You lose life equal to its converted mana cost.
{2}{b/g}{u/r}, {t}, sacrifice Tower of the Cabal: You may
cast target instant or sorcery spell from your graveyard without paying its mana cost. You lose
life equal to its converted mana cost.