At first I was able to enter Thanatos's room by myself and kill the Thanatos that was weak to F/p's, however none of them dropped Icy Soul Rocks. My second attempted I wasn't able to enter the room by myself, but had to have a party member. My second time with an I/L the Fire weak ones did not spawn at all and the Ice weak ones dropped a lot of Fire Soul Rocks. I attempted for the third time the next day with another I/L, but the Fire weak ones had yet to spawn. I was assisted by a GM (tysm <3) and killed several Fire weak ones and they still didn't drop the Icy Soul Rock. I believe Spawn and Item drop may be bugged for this quest.
