Damn, I like how Garling walked in without respect, just sat down and told them how it's going to be from now on. As for Saturn, it is as I assumed, the Gorosei are individuals with their individual powers, Imu just shared his eternal life with them most likely, so as he revoked it, Saturn started to rapidly age.
@Salah WG how do you assess Garling's role here? iirc, you assumed the likes of Garling don't know of Imu's existence, yet he walked in unphazed with full knowledge and told them how it's going to be. But also the Gorosei or Warcury in particular telling him to shut his mouth prior to knowing he has become an elder too, which looks like the Gorosei after all had higher authority than Garling and Garling is indeed a CD and part of the WG rather than a separate entity (holy knights that have higher authority than CD).