Luckily, Zerra had everything prepared in inner space. Otherwise, it would be unknown whether he could be saved or not. Healing ability could help someone recover faster, but it wasn't omnipotent.
It would still need time and worked best on physical injuries. If someone was poisoned, the wood power could still help them somehow. It depended on the type of poison.
A slow-acting one was still possible. They could do long treatment to deal with it, but… for a poison with instantaneous effect, the person would still die in most cases.
Of course, Zerra guessed that at a high level of power, they might be able to heal poison. For now, it was impossible.
Unfortunately, Derek was also poisoned. It was a sure fact.
His face was slowly turning bluish and purple. She could help him with his external injuries, but his poison needed a little more care. It didn't seem to be a deadly one. However, if it were combined with his severe injuries, it could indeed lead to a fatal outcome.