Sorry I think you misunderstood what I was after I don't mean the great form spirit powers e.g. storm, quake I mean the greater spirit powers (wish I had a better term). Even with the summon great form ritual the great form spirit modification is grayed out anyway and unselectable, any ideas on that?
That is the optional powers that can be added to any free spirit (at least I think it needs to be free) on page 205 of the street grimoire e.g. . . .
GREATER POWERS
Greater powers are so dramatic, unusual, or powerful that they can often define an entire encounter with a spirit. Gamemasters should keep these powers rare and limit a spirit to only one of them.
HIDDEN LIFE
Type: P Action: Complex
Range: Touch Duration: Permanent
The spirit uses this power to permanently place its life force in a creature, place, or object. As long as the hiding place remains safe, the spirit cannot be permanently banished or destroyed by any means. The spirit is able to return after a year and a day if banished with its spirit formula, but a character holding the spirit formula may call the spirit sooner.
The hiding place gains Immunity to Normal Weapons with a Magic equal to the spirit’s and Immunity to Age (p.397, SR5). If the hidden life holder is destroyed, the life force returns to the spirit, and the spirit is treated normally.
There's not many there (energy drain, move vessel, create cash etc)