What does this have to do with tearing a soul?
Also kavu ;_;
This Kavu is soul torn, not trying to tear a soul. And Kavu's have been too long neglected.

Why cost it this way? Why not just make it a green guy with a red kicker?
What is wrong with split cost? Its the same reason as Vexing Shusher and Boggart Ram Gang etc.
Anyway,
Madness is way too weak in all formats right now. I will even venture out and say that traditional aggro has gone downhill.
So aggro(madness) needs some crazy amplifing creature to fight alongside Tarmogoyf as it races combo and control.