When you stake your NFTs (=monster cards) to mining, the rate and quantity of output will be affected by the mining efficiency of the NFTs. It differs based on the rarity of the NFT. Details as follows.
Mining Efficiency (Units)
How to improve Mining Power (Not Implemented Yet)
Monster's mining power can be increased by pledging $MBS for 7 days to improve the card slot level. If the pledge is released in advance, 10% of the pledge amount will be deducted and enter the flow pool at the same time.