Hi, normally I don't go in for killing Sims but recently I've started a project where I try and kill all of Sunset Valley. One day as Morgana Wolff was going through the death rigmarole with Grimmy, when I clicked on him a command popped up saying 'Play Chess for Morgana's Life.' My Sim only has 1 point of logic but she won and Morgana was ressurected. Upon further testing, I found out that if you canceled the action, Grimmy would still go to the chess table, practise chess for a short while then say that you had won. Afterwards, he always stayed around. I'm unsure if this works for old age - the likelihood is that it doesn't. It may also come with Ambitions and you probably have to have learnt the logic skill. Sorry about all the 'maybes' but I'm too busy messing with Ambitions to test it properly.
![Wink ;)](https://www.carls-sims-4-guide.com/forum/Smileys/default/wink.gif)
Anyway, it's a very useful thing and I noticed it isn't in the guide.