"Now that sounds like a story." One that Istredd will not push, but he is leaving open if Lucifer chooses to snap at it. Otherwise he first goes for his hand. He brought water with him too so he can wash the wound before bandaging it. Otherwise it might fester. And maybe it wouldn't, he doesn't know Lucifer's healing ability, mages heal very quickly as well. But he is going to be thorough and practical about this.

His touch is gentle, he is not a healer by trade, but he has helped people who are wounded in the past. When everything around you is on fire and at war, you have to learn how to react to it. That's back home and here. He knows a stab wound when he saw it, and he doubts Lucifer stabbed himself. He wraps the hand, covering the wound itself with the bandage after taking as much of the blood he can before staunching it.

"Take off your shirt so I can do the same to whatever happened there. Have you been told before that if you're stabbed, you shouldn't take out whatever it was? That is how people bleed out before a healer can get to them."