Rhode had his reasons to be extremely vigilant against this Undead Keeper. Ordinary undead creatures were mainly weak in their defenses as their bones were usually hidden under a thin layer of skin. Although some of the zombies had thicker fleshes and were tougher, this Undead Keeper was on a whole new level. It had an extremely thick and hard body that consisted of countless corpses. Ordinary blades would get stuck and couldn't be retrieved after slashing into it. Furthermore, fire attacks wouldn't be effective against it due to repulsive green blood flowing under the disgusting flesh. The Undead Keeper would squirt the venomous blood from its body to extinguish the flames. However, this would make matters worse as once the blood evaporated in the flames, the venomous fluid would turn into mist instantly.