On August 27th, according to Sky Ecosystem, with the launch of Sky, the upgrade token SKY was also launched. This token is an upgraded version of MKR and a governance token of the Sky ecosystem. Each MKR can be upgraded to 24,000 SKY. USDS (Sky Dollar) is an upgraded version of DAI. USDS is a stablecoin that can receive native token rewards. DAI can be upgraded to USDS at a 1:1 ratio.