Yes, 24 Sim hours. I had nothing better to do, and William's moodlet manager + the other need reducing LTR's meant they could've done that for weeks
You should've seen the look on my face when I got that elixir though
And ever since William had that time with Raves, Grim has lingered at every death, despite the fact that I'd only gotten him to linger once in several years before that