Someone mentioned that golden whetstones stack additively (e.g. one whetstone = 1.25x dmg. two whetstones = 2.50x damage). And I wanted to see how well it'll work with the assassin dagger and barbells. After tons of tries, this is the result. The dagger is too weak normally. The only way you can pull this off is if you somehow have scaling infinite block as you try to get kills with the dagger. In most games, you die before the dagger ever begins scaling. Finally, by the time endless dungeon starts, the enemy's hp scales faster than the dagger can scale. I might be doing 900 dmg a hit, but enemy has 2000-3000 hp each. The game above I was super lucky in getting 4 whetstones by floor 11.