Possessed doll

[Bears With Lasers]

Justify those Deformity feats and I'll give you the VT Award for Extreme Cheesiness Cleverness.

The Warforged twists and alters its own shape, going outside of its intended design; it files its jaws, adds extra reach and joints to its limbs, and pads out its bulk with waste materials until it is a grotesque moquery of the powerful armored warrior-construct it once was.
It does so in service to dark powers, and to make itself look less like humanity, for which it bears a deep grudge and secret loathing.