The penultimate boss in Sepulcher of the First One was Rygelon. Early on we realised it wasn't an easy fight. Both because of the dps-check and also because it was so easy to mess up with the different holes. We decided to take on a very organised tactic where we assigned everyone to exact holes, and expected everyone to enter just that hole and not accidently anyone elses. We also planned who should soak the Cosmic Cores and when. The execution was to begin with lacking, but over time we got better and also started getting close to doing enough dps to actually kill him in time. Today we finally managed. Good job everyone! Only one boss to go!