You can upgrade pickaxe into high-class pickaxes, if you wish.
Normal pickaxe: same as now, for seeking hard-adventure.
Gold pickaxe: gain 20 extra gold per kill.
Titanium pickaxe: eating a food while holding this grants haste and levitation.
Diamond pickaxe: if the target is under 1/4 hp, your attack is always guaranteed to hit.
Nightingale pickaxe: if irl time for your location is at midnight~7am, deals 1.5x damage.
Glass pickaxe: always deal double damage except bosses, but can break if you are hit by any type of attacks on an open door tile, it breaks. When breaks, all invested sous minus one are returned to your inventory.
Netherite pickaxe: your pickaxe is immune to disarming trap, and deals triple damage if the target is standing on an open space.
ChatGPT pickaxe: when you kill an enemy via this, a random encouragement message is out. Probably too OP