Margle, Restored Demilich

{3}{b}{b}: Create two 1/1 Black Skeleton creature
tokens. This ability costs {1} less to activate for
each Skeleton in your graveyard.
{8}{b}{b}: You may cast a spell without paying it's
mana cost. This ability costs {1} less to activate for
each other Skeleton you control. Activate only as
a sorcery and only once each turn.