To solve the riddle of the Elder God, you need to collect three Amulets of the Elder God - Kronika's Amulet, Cetrion's Amulet and Shinnok's Amulet. In this guide you will find a detailed info on how you can find all three amulets step by step. It's pretty straightforward at its core, but you can do it much faster.
@hi_hi You might well be right. I had no interest in the game at all, then at the start of lockdown my son asked me to get it so that we could play online and still have some time together on a daily basis - just an hour or so each afternoon to help get us through while we were apart.
I really didn't "get" it at first and wasn't enjoying it but actually, although I'm not interested enough to play it on my own, I recognise that it's actually extremely well-made and enjoy our time when we do still play (not so often any more as he is able to visit now).