Hey there, The catalyst is still tied to the hidden chest in the vault at the end of Sundered Doctrine. It doesn’t come from Ikora. That chest will only drop the Finality’s Auger catalyst if your character already has the exotic when they open it; if you ran the dungeon and opened the chest before you owned the weapon, it won’t award anything. Now that you have Finality’s Auger, you’ll want to go back into the dungeon on the character that owns the weapon, head into the vault again, and open that chest once more. With the exotic in your inventory, the catalyst should drop from that chest. If you’ve rerun it with the weapon and still don’t see the catalyst, double‑check Collections → Patterns & Catalysts → Catalysts → Energy to make sure it’s not already unlocked there, then reply back with your platform, character, and roughly when you last completed the dungeon so support can investigate further.