Whetstone is way too op as is. Suggest reducing dmg by 1 and limiting it to one use per round.
Legendary whetstone should be changed to +4 per use with a limit of 3 uses per round.
I don't know if there is a Rare Whetstone but if so I would suggest it gets +3 to damage with a limit of 2 uses per round.
All Whetstones would still require 1 energy to use.
Philosophers stone should be adjusted to consume one use of a consumable per click. If more than 1 consumable is next to the stone then it should give 1 energy for each consumable. (only one use per turn)
Add the ability to save with 3 slots and I will gladly pay $10
Oh and please get this released on steam :-)