Yoon "Mercury" Moon Soo is a South Korean StarCraft progamer. He plays as Terran and is a former member of SK Telecom T1.
Wings of Liberty
On January 31, 2013, Mercury tried to qualify for 2013 Global StarCraft II League Season 1. In the 2013 Global StarCraft II League Season 1 Preliminaries he made it to the Semifinals of the Group 6 where he defeated jjakji 2-0 in Quarterfinals before losing 2-1 to Comet in Semifinals.