I was optimistic about the story at the beginning but then it went downhill really fast.
MC has a Blood Eater skills that consumes his kills and gives him stats in return. Consuming a killed enemy liquefies the body into blood that disappears after consumption. He needed to raid an orc settlement stealthily. You'd think Blood Eater is helpful in removing the bodies he kills while sneaking around. No. He kills several orcs, doesn't use the skill, gets noticed and chased, runs away and hides. Did he learn? No. Repeat. Then, he reaches the boss and his mana and stamina are empty. He will use the skill to gain some mana and stamina, right? No. He jumps at the boss cuz he wants to. He is lvl4, boss is lvl 12. Not a normal monster, a boss! then he kills the boss. Don't ask how and why. He just used a skill that consumed 20% of his mana before. He used it while his mana is empty then boss dead. Dones. He will use blood eater now to consume the body of the boss to gain some stats, right? No. He just leaves and goes back to town. Author forgot about the skill completely. Fun.