I've spent 2 days looking for this story and I CAN"T FIND IT!!!! *sobs* And it is driving me insane.
Thor shows up and at Tony's lab and asks him to build a container. They go to a cave where Loki is tied up with the whole snake dripping venom scene. Loki has been badly damaged by the venom and Thor has been able to do anything to help him. There is a spell that if Thro does anything to help Loki he will be banned from the cave. The container is used to redirect the venom away from Loki. Steve and Bruce also help. The put pillows for Loki to lie on so he can be more comfy and they feed and heal him.
Please!! Somebody save my sanity!!!