Thundering explosions occurred repeatedly at the place where Satan and Jack were dueling. They had been at it for two and a half days now. Even after fighting for so long, the victor was still undecided.
In Satan's case, he was unmistakably stronger than Jack. If both sides didn't use any buff, he would also be slightly faster than Jack. Jack's HP was not high, considering he was an outworlder. In theory, it shouldn't take long for Satan to defeat Jack. Yet, it was not so. The reason was that the time he successfully landed an attack on Jack was scarce. Jack also had many means to recover his HP after getting nailed by those rare hits. Hence, why he couldn't defeat Jack after such a long battle.