Severus flew back, drenched in blood and sweat with a wild look in his eyes. "Go, get upstairs with the Healer. I'll hold them off." His voice was lower than usual, a feral fear dripping from it, but he stood his ground as he started pushing the pair towards the door. "Better idea, Harry..." Severus reached into Harry's new tactical robes, pulled out a vial from the left breast pocket, clicked something on the top of it, and threw it towards the pile of dead that was getting back up to give chase.