I did not know about the ice,can you explain please,and the plasma is not really made by superheating steam,he just makes it and his heat resistance is like ' shoot me into the sun pfft I'll only die through lack of oxygen.' he can melt people with his steam or at least scald them. He can make people into ash if he charges the heat blast long enough,about five to ten seconds should do it. He has a cool down on his plasma blast, about thirty seconds to a minute, if that is a good enough limiter. The tech side of things goes clockwork and steam, but still effective. Kind of like a rail gun. the gears spin very fast, propelling objects at very fast speeds. These are with his sidearms and they are very quiet upon firing and use no gunpowder.the gun is powered by his steam allowing for limitless propulsion.