On August 20, the MEV tracking site EigenPhi reported that sandwich attacks had exceeded $17 billion in the past month. Meanwhile, a new MEV contract has emerged that employs new tactics and a more sophisticated multi-layered mezzanine attack against the DeFi protocol - it arranges trades before and after victims' trades to manipulate prices and profit from victims. The bot is an automated trading system that exploits vulnerabilities in the DeFi protocol to generate profits. Its new attack involves executing multiple trades within the same block to manipulate the exchange rate in the Uniswap V3 pool, thereby profiting the bot at the expense of other users.