So the last two attempts at a power for Joshua have failed, so I'll give it another shot. Hopefully this'll be acceptable.

[hider=Power]
[INDENT][b][i]Material Mimic[/i][/b] | At will, Joshua can copy any material he touches. He isn't just covered in a layer of the material, he becomes that material. Every part of his body is altered to be made of that material. Despite this change he can still move his body as normal, although his movements may be a bit more mechanical if he's made of something hard. His muscles retain their function as his body becomes a series of interlocking joints and hinges so as to maintain the full range of normal movement even while he's made of steel. It takes about one-and-a-half seconds for full conversion, starting at the point of contact and spreading across his form. This makes him quite hard to kill, and comes with some other changes.

While made out of a heavy material, Joshua's strength is increased to the degree that he can still move normally. Increased inertia and momentum may still make his movements less agile, but his speed is usually unaffected even if he's composed of stone. Additionally his senses are dulled to the point that he can't taste anything, and he hardly feels pain. Not that taste is relevant, as he requires no food, air or even sleep while he's made of a non-flesh material. He's effectively a golem in these situations. Blood is also turned into the material in question meaning he doesn't bleed out, and most of his organs are made unnecessary. As such he can even survive decapitation in this state, although that would still take him out of the fight. Destroying his brain or heart will kill him, regardless of form. Joshua also gains the ability to somewhat alter his form while transformed, such as sharpening his fingers into blades or spreading out into a thin layer when made of cloth or paper.

Joshua's transformation tends to take on the contextual properties of a material as well. If he touches painted metal he'll become painted metal, instead of mimicking only the paint or only the metal. Similarly his starting body temperature will alter to be similar to whatever he's mimicking. It's possible for Joshua to transform only part of his body into a particular material by breaking contact before the transformation is complete, but this is highly uncomfortable.
	
[b][i]Limitation(s)[/i][/b] | Transforming requires Joshua to touch the material he wants to change into. And while he can access a host of different abilities depending on the material he copies, different forms come with downsides as well. Paper is thin and light, allowing him to leap off buildings and glide with the wind, but it's also easy to tear. Cement is tough and durable but it's also slow and clumsy, and has a tendency to break floors. In addition Joshua can't change back to normal on his own. He needs to touch living flesh in order to go back to being a person, in the same way that he needs to touch any other material to mimic it. And like how he copies the traits of other materials, he also gains the skin colour and minor aesthetic quirks of the beings he uses to turn human again. Using a dog, for example, would leave him a very hairy man with yellowish eyes. 

[b][i]Weakness(es)[/i][/b] | When not mimicking a material Joshua is a perfectly ordinary human, and therefore easily defeated by most superhuman combatants. Transforming or changing from one material to another takes a second and a half, creating an opening for an enemy to strike. Joshua also inherits the weaknesses of whatever material he's mimicking at the time.[/INDENT][/hider]