The mod that gives mobs random buffs sometimes gets totally out of hand and a skeleton can get healing powers which are quicker than the damage you can make with a heavily upgraded tinkers weapon. You can just skip that mob and move on of course but on my world the Ender Dragon got the extreme healing effect making it impossible to even make a dent in its health. Even in creative the dragon healed faster than I could damage it with a cheaty chaotic sword. The only way to resolve it was to relog which resets the mob buffs.
The mod that gives mobs random buffs sometimes gets totally out of hand and a skeleton can get healing powers which are quicker than the damage you can make with a heavily upgraded tinkers weapon. You can just skip that mob and move on of course but on my world the Ender Dragon got the extreme healing effect making it impossible to even make a dent in its health. Even in creative the dragon healed faster than I could damage it with a cheaty chaotic sword. The only way to resolve it was to relog which resets the mob buffs.