Upgrade

The upgrade functionality consists of the possibility of burning $MSB and another NFT character of the same rarity to improve your selected miner. Each Rarity has an upgrade cost, but the improvement is the same for everyone. Each upgrade adds +1 Lunchboxes per day, limited to 2 upgrades per miner reaching the maximum lvl of 3 stars. When upgrading, the miner who will level up also receives a fixed increase in hit power equivalent to 30% of the miner's base HP burned for the upgrade.

Dummy and Unique miners cannot upgrade!

Rarity	MSB Fee
Common ⭐⭐	400
Common ⭐⭐⭐	400
Uncommon ⭐⭐	500
Uncommon ⭐⭐⭐	500
Rare ⭐⭐	600
Rare ⭐⭐⭐	600
Epic ⭐⭐	700
Epic ⭐⭐⭐	700
Legendary ⭐⭐	800
Legendary ⭐⭐⭐	800

upgrade reference example