4. The challenger needs to stake the same amount of TWI as the starter’s.(When the battle starts, each player expends 1 food,all foods consumed in PVP will be burned)) The winner will get 90% of the total staking TWI (which can be claimed after 24 hours), and the loser loses what he stakes. 5% of the total staking TWI will be added to the PVP prize pool and the remaining 5% will be burned directly.