Quote Originally Posted by Saeleyna View Post
It's definitely RNG, but you simply get more chests if you contribute more to a fight. Usually if I join a fight that's ending I get maybe 4 chests total whereas if I did a lot I'll get 8-12, which means more likely to get more souls. Also as someone mentioned if you're the one that starts it pretty sure you always get one.
Umm, that can be potentially placebo. Memory doesn't usually work the way we think it does, way more reliable to prove with hard numbers.

Devil souls can also drop in the spawn chest of a ragna raid, true.