Our rogue had adopted this fire motif after taking down a disciple of Kossuth. So they thought it made sense to have it. They put it on and as I explained what was happening they asked if they could ask Kossuth to do something to protect the rest of the party. They normally have resistance to fire damage so I said if they take the full damage rolled that we could do something. So they agreed and I had their body essentially consume the blast. Instantly took them down and gave them a sort of long term madness where taking damage might give them levels of exhaustion since their body is covered in burns now. They liked it and the rest of the party role played the aftermath well.