I invaded some world and got destroyed by the host + 2 friends they summoned.
However, while the host was summoning friends, I picked up what looked like a small bag made out of fabric from the ground near him (I was trying not do die and I was nervous, so don't trust my memory too much on what the object looked like).
It turned out to be 8 Souls of a Great Champion!
Why would they just be there on the ground? Should I be invading people all the time and looking for loot like that? Did I maybe just happen to barge in when they were in the middle of trading souls with another player?