In my game, there are God Weapons, God Modes, and God Attacks. God Weapons are not one hit kill weapons, just stronger weapons with names like "Sword of Ares" and "Neptune's Trident" that look awesome. They do give the hero the ability to access God Mode, which gives them special buffs or abilities, like doubling attack and defense stats for the Aries hero and a cloning ability for the Gemini hero. But still no one hit kills. It also takes a full TP bar to access and TP won't be easy to accrue. God Mode give them access to a special God Attack that is a one hit kill for most grunts, but not for stronger enemies and especially not for bosses. The God Attack requires a full MP bar and a full TP bar, so it's very difficult to achieve. I plan to design these in a way that they're extremely difficult to pull of on standard enemies, and thus basically pointless for minute to minute play, but easier to do in major fights, adding an extra element of gameplay during intense battles with the primary antagonists. It'll essentially be a way to get a leg up on the super powerful enemies.