Digital artist Jack Butcher announced the launch of "Checks Elements". Checks Elements is an innovative 152-piece physical monoprint series with on-chain NFTs. The series is based on the classic elements: earth, fire, water and air, and the first auction of works related to the elements of earth, air and water will begin at Christie's on May 16. The rest of the series will be available for auction within 24 hours after the Christie's auction ends on May 23.