Xeterverus, God of Unexistence

Shroud
While Xeterverus is in play or being cast, any
time you would pay {1}, pay one mana of each
color lands you control can't produce instead.
{x}{1},{ut}: Cast one card you own with converted
mana cost X as though it was cast from your
hand. Choose only cards that don't have any copy
in the current game.