Chaosmancer
Legend
The wonder is partly based on the obstacles and how they are overcome.
Trivalizing the Devil King by killing him with a pencil makes the Devil Look weaker and weakened your legend.
Now if its the final blow after all else is spent and broken, it can be epic.
But I don't like the idea of the hero picking a stick off the floor and decimating Hell with it. It make Hell look weak.
Only if you don't contextualize it correctly. Doom Slayer took on Hell with perfectly mundane guns. Doesn't make Hell look weak, it makes the Doom Slayer look incredible.