Su Ping was itching to try.
The worst that could happen was that he would have to spend energy points on his revivals.
However, compared to the benefit of refining his energy with the Heavenly Tribulation, Su Ping believed that the energy points would be well spent. This was something that he might only be able to encounter with luck, not by searching for it!
Since Heavenly Tribulations could better his pets, it should be able to improve his energy as well.
His own strength and powers also mattered. Only after becoming powerful enough could he control fiercer and tougher pets. Otherwise, violent pets like the Inferno Dragon and the Dark Dragon Hound wouldn't have obeyed him, let alone act like lambs in front of him.
"I want to have a try," Su Ping said to Joanna.