User can turn into a shot gun

Pros:
-user can change size of gun form
-user can make blood and water into gun shells
-user can make gun powder out with bone marrow

Cons:
-user can't float or operate gun form alone
-user will lose blood and water from their body
-user weakens greatly with overuse

Weakness: overuse
User will weakness greatly with overuse, loss of blood, dehydration, brittle bones and dry skin