SAT Anniversary Challenge Romashka 16.03.2019 2017, Charm, Weekly Challenges Reward Comments 19/12/2017 SAT Anniversary Challenge overview Rainbow Six Siege – SAT Anniversary Сhallenge Celebrate two years of Rainbow Six: Siege with the Ubisoft Club Challenge. Win 10 rounds with SAT to obtain Hibana’s X-KAIROS charm. X-KAIROS charm