Obscura Ascendancy

“Whenever you cast a spell, if its mana value is equal to 1 plus the number of soul. counters on Obscura Ascendancy, put a soul counter on Obscura Ascendancy, then create a 2/2 white Spirit creature token with flying. <br >As long as there are five or more soul counters on Obscura Ascendancy, Spirits you control get +3/+3.”