User blog comment:DYBAD/Character Sheet/@comment-4867780-20160925064633/@comment-4867780-20160926102517

He definitely can detach parts of his body for many purposes (though "growing extra parts" would be more accurate), and often uses it in combat combined to his planeswalking ability for surprise attacks, raining custom living projectiles of any type (kinetic, explosive, energy, etc.) that may also merge on impact to apply Materium-based transmutation effects, or be enhanced with some level of life-force absorption to quickly take down massive opponents.

He may also generate any type of elemental or energy attacks from his body, and use the Materium they are made of to channel his absorption ability. For example, his kinetic blast could also absorb physical resistance, obliterating even invulnerable targets. In the same way, a fire blast could also absorb thermal resistance, incinerating even fireproof targets.

As you mentioned, it can also be used in more constructive ways, though construction in Selforge City relies on the imperceptible Selforge Essence alone (see the titular second section in "Base of Operations") rather than the hybrid Materium, which was specifically created to grant Lawrence a sense of physical identity, and is thus limited to his avatars.

Constructive applications belongs more to his extraplanar adventures, and usually take the form of mighty artefacts forged from his own body, or crystal-like shinny blood bestowing amazing powers or miraculous transformations, or infuse the Earth with a part of him so it may heal from devastation and thrive anew, or mature with unprecedented new possibilities.

The Selforge Essence within the Materium always withdraws back to his main body once its task is complete though, with the extra parts losing their polymorphic nature and stabilizing to normal matter in the state they were in during the withdraw, so the chosen properties live on without strings attached (and without Lawrence scattering his anatomy everywhere ^ ^;).

What is the omni-steel exactly ? I looked in up in your character sheets, but couldn't find it.