Balial, Lost King

Mutate {b/r}{b/r}{b/r}{b/r}
Whenever this creature mutates, exile cards from
the top of your library until you exile a nonland
permanent. You may pay life equal to the
converted mana cost of the exiled nonland
permanent to repeat this process. You may put
all nonland permanent cards exiled this way into
your hand or onto the battlefield without paying
its mana cost.