This was the third incarnation of Onslaught. I didn't really get to much of a scope on onslaughts actual size but I got the impression he was massive, like in the x-men comic where he grabs Juggernaut and rips out his gem. So I tried going as large as possible.
Base figure is Icon venom with a lot of Apoxie and Craft foam. The head has a Bionic ball joint for 360 degree potential.
Like the scale - is the armor from the pre-Legends Onslaught?