This is hero of col2 and it is belongs to igg. So you can use it because clash of clans did it about clash royal.
It is Toxic Shawman, I have seen him being used in most of the battle modes of Clash of Lords. He is one of the best heroes in the game along with Won-Ton. (Won-Ton looks like Pain-da but 10 times better lol). But if Shawman gets added that would be pretty cool.