Kastorran Pup - Destory Kurn Urns and Kurn Urn Clusters. Each one has 0.4% to 0.8% chance to drop. You will meet many Urns along the FoA journey, from Icebound Passage to the end.
Roc Chick - Tempest Totems have 0.6% chance to drop it at Asendant difficulty. You can also get it at lower difficulty by enabling Tempest Totem by Ascension Altar, but its drop rate will decrease either.
Only Necromancer can get these. Necro has special conversation with the 3 wights in Scarfell Depths to control their souls. These Binging Stones are soulbound and can be used only once.
Oh lol I never realised that, thought it was added in the latest patches as I just happened to pick Veilwalker. I was extremely disappointed though when I realised they’re just a temporary once-off summon (which I of course immediately did outside their room)
Make sure you choose the ‘trap the spirit’ option in their dialogue.
