Ykoms Niaga Esir Nellaf Fo Hsa

Choose any number of creatures that share a creature type in graveyards with total mana cost X. Exile those creatures. For each creature exiled this way, create a token that's a copy of that creature, except it's black, and has haste, "Whenever this creature becomes the target of a spell or ability an opponent controls, sacrifice it,"
and shadow. (It can block or be blocked by only creatures with shadow.)