Wandering the Multiverse: Becoming a Killer

My name is Ethan Wren, a fortunate adventurer with the ability to travel across dimensions and worlds. Each time I traverse a new world, I acquire two powerful abilities by completing main missions and special tasks. - Slayer: Every time I eliminate a humanoid entity, I can gain a special trait to enhance my skills. Eliminating countless zombies will elevate me to a god-like status. - Gamer: I don't need cheats to dominate games, as I am a living cheat code. - Swordmaster: All sword techniques in the universe are within my grasp. - Connoisseur:"My friend, you smell delightful. Fear not, I am sincere with my comrades and will stand by them." - Binder: Monsters, demons, creatures, come to me! - Timekeeper: Control time, do as you please in school, do as you wish in the office! But despite my power, I prefer to blend in with lower-level martial arts. You wonder why? The world is so perilous, of course, I must become invincible before I take risks! The apocalypse reshapes human civilization, the martial arts realm takes control, the supernatural world becomes the progenitor, the armor world rises to emperor status, the absurd realm ensnares the succubus, the Ultra world trains heroes; the gods realm creates legends; the solitary world subdues the present day; the interstellar world forges the strongest mech; the myth saves Sophia; Western Paladin III; Survival at Sea; Marvel; Odyssey to the West; Mortal Ascension; DC; Duel Monsters; Beast Mastery; Primordial Realm; Lovecraftian; Dragonborne; Dark Void, Shinobi, Pirate, One Punch Wonder, Guts, Neon, Undead, Warbringer...