Drax goes through several obvious cycles of staring at the strength belt and Tox.
After several moments of contemplation, he appears to arrive at a decision: "Tox, would you like this belt? I'll make you a deal. I will give this to you on one condition: any time you feel the need to use your blood magic, you must ask and receive permission first. From myself, Razk, or Scratch. In that order.
If you fail to ask one of us before you attempt to use your blood magic, I will take this strength belt from you and give it to one of Tarkin's hunting dogs. Do you understand? And do you agree to those terms?"