Mining perks 3–4

Purchase unlocks a perk; activate it in a free slot to use its effect. Check the live card for its current level, price and XP bonus.

Tempered Grip
Use with this skill's bound relic when it can take durability damage.
Ordinary unbound tools do not gain this durability protection.
A non-damageable relic has no durability to preserve.

Stonebinder
This perk adds its listed XP bonus while active.
It has no additional implemented ability beyond that bonus.
Compare the current bonus and cost with your other unlocked perks.