I meant strength. [I]Mirakuru[/I] is a one off drug, but [u]Miraclo[/I] is a repeat drug. Miraclo is what the Arrow creators got inspired for to make Mirakuru. So, how is painlessness a liability? and what do you mean by temporary?

and by density I meant his muscle density is similar to common concrete. However, he can swim. His skin is normal.