Did one, so let’s do another!

Osteocraft Spell 3

Necromancy
Traditions arcane, divine, primal
Cast

somatic, verbal
Range touch; Targets 1 living creature
Saving Throw Fortitude; Duration varies

You manipulate the small pieces of the creature that regulate it bones either making more or destroying the bones in a creature. When the creature is touched, the caster decides on a limb to grow a new bone in or a bond to destroy. The living creature must attempt a Fortitude save.
Critical Success The living creature is unaffected.
Success The living creature is unaffected or the level of clumsy is reduced by 1.
Failure The creature becomes clumsy 1 or increases its value of clumsy by 1 and must make a save at the start of it’s next turn.
Critical Failure The living creature becomes clumsy 2 or increases is value of clumsy by 2 and must make a save at the start of it’s next turn.

If a creature would become clumsy 4, the the spell is complete and the bone in the limb is destroyed or new bone grown. The creature completely loses use of that limb until the bone is destroyed or grown back. If an arm is lost, spell with somatic components can not be cast and weapons needing the arm can not be used. If the leg is lost, the creatures walking speed becomes zero if it has two legs or its loses a proportion of its speed if it has more than two legs.

Heightened (+1) The number of targets increases by 1.

Thoughts?