I noticed that when picking up a large number of obducite, it’s not being added to my inventory. I did an event in a nightmare dungeon and picked up 951 obducite. I already had over 300 in the inventory. When i was done and went to the blacksmith to use it, i only had over 500. Picking up 2,5,8,10 is all good even 100. I picked up 251 obducite and only got a fraction of it. So 100 or less is good, more than that and you don’t get it all in my experience.