Board Thread:Episode Discussion/@comment-4141313-20190112144055/@comment-4141313-20190113204959

Watching the fight again, Adam's clones only appear to show up after he's already absorbed some damage, and they don't move in sync with him. The first time, he was stationary while they attacked Yang, the second time, they ran with him but at different speeds.

I think the clones are just constructs made of solidified damage, hence why he only uses them after he's already taking sufficient damage. The fact he then has them fade back into himself implies they either don't last very long, or he can reabsorb them to regain the boost.