Manak, The Soul Gorger

Menace, Firststrike
When a creature is put into the graveyard put a
soul counter on Manak, The Soul Gorger
at the beginning of your upkeep you may remove
a number of soul counter from Manak, The Soul
Gorger equal to the mana cost of a spell in your
hand or graveyard, if you do you may exile that
card face down and cast it as if it had flash
without paying its mana cost