At that moment, he already possessed a certain level of conventional combat power and could, without resorting to unconventional means, defeat high-rank Mature Level monsters in one-on-one combat.
But anything stronger wouldn't do; he would have to use his limited and immensely consuming unconventional methods.
Since he had the Eye of the Soul, Rod could generally gauge the strength of a monster and would skirt around those that were difficult to deal with.
However, it was unpredictable when a corpse would turn into a monster.
Sometimes, though there were no visible threats, a corpse would suddenly jump up as he passed by.
If it were a weaker Living Corpse, it would be manageable, but particularly strong Living Corpses were troublesome.
Especially those that had been powerful combatants before their deaths. They retained some of their prior combat skills, and even if they were fighting on instinct alone, they were very tricky to handle.