Taking off from Arbiter's Aku thread - what over magic, mystical weapons take down Aku?
Not looking for planet busters, but ones carried by the hero or antihero and used in fights. Has to be a weapon, not a spell envoker, Some possibilities:
1. Elric and Stormbringer
2. Marvel Thor and classic Mjolnir
3. Alan Scott's Power Ring
There are lots of strong weapons in other anime that one could dig up. The Shield Hero folks, Seven Deadly Sin folks.