Caveira Birthday Challenge Romashka 03.03.2019 2017, Charm, Weekly Challenges Reward Comments 24/10/2017 Caveira Birthday Challenge overview Rainbow Six Siege – Caveira Birthday Challenge Wish Caveira a Happy Birthday with the Ubisoft Club Challenge. Play 7 rounds as Caveira to unlock her Caveira Medallion Charm. Caveira Medallion Charm