Genemorph

Genemorph(minor) by Mr. Twist

This is a limited shapechange ability, unable to change the inner or outer appearance of a character. What it does change, however, is the composition of the character. They are able to alter their own genetic structure. This does not cause any change in features or anything due to a different genetic structure since the body still knows what the 'template' person is. Any tests done will show the changed genetic structure. Blood type can also be altered at will, making the person the perfect blood/organ donor or recipient. All they need to do is change their own blood type to match, even to the point of very rare blood types.