UPDATE: After perusing the inter-webs for a bit, I found a video posted by SkinSpotlights. This details all the moves for the new LoL character Jayce. It looks like his weapon switches between an axe and a gun, allowing him two different movesets. This could be confusing or incredibly fun, we'll see as more information comes out.  Link to the video below.

http://www.youtube.com/watch?v=QIdUV3AH7bE