Too Long; Didn't Read
User221 came out of nowhere last November and almost immediately caused a furor on NFT Twitter. His first big hit came when he took out a coolpets sale, Aku Dreams contract blocking and freezing all money on the contract, and there was 30k$ in ETH for a second. After two months of rest, user221 is back in the NFT sector and already waiting for the next opportunity. His activity has motivated programmers to explore this direction and try to take out seals themselves.