The power to transform those the user possesses. Combination of Possession and Shapeshifting.
The user can shapeshift, mutate, or otherwise transform their host body in various ways after possession.
- May be a limit on how much they can transform the body.
See Also: Transformation of the Possessed.
The Hylden Lord (Legacy of Kain) transforms the body of Mortanius the Necromancer into a hulking beast.
The Transformed (Legacy of Kain: Defiance) are the result of Hylden spirits transforming their human hosts into monstrous shapes.
Freddy Krueger (A Nightmare on Elm Street) gruesomely transforms Jesse Walsh's body into himself as he possesses him.
The Leviathans (Supernatural) can shapeshift their host bodies into anyone else by sampling DNA.
Agents (The Matrix) are capable of taking over the bodies of anyone still plugged into the Matrix, "overwriting" them in order to physically manifest and deal with the Resistance.
Diablo (Diablo III) manifests as the Prime Evil after possessing the body of his daughter Leah.
After possessing Barry Kahn, Watagash (Dragon Ball Super) transformed his body in different stages, the first simply making him more muscular...
...the second mutating him into a larger, ape-like creature...
...and the final turning him into a giant monster with no resemblance to his original form.
The Daemonites (Image Comics) can host an individual while maintaining the ability to alter their appearance.