For a moment after Rain weakly asked what he was doing here and brusquely explained she'd been bitten, Feral felt like he'd been punched in the gut. Just as the emotion was really beginning to sink in however, the obvious slapped him in the face. With so much of Rain's blood dripping all over the bed of the truck, the sickly burning-metal smell of the Werewolf Infection should be overpowering if the pyromancer had been infected. Thoroughly confused now, since there was no question the barely-conscious woman believed what she was saying, Feral quickly decided he needed to see the alleged bite for himself. Which immediately confronted him with the problem of how to access a wound that seemed to wrap across the top of her shoulder onto her back while Rain was laying on it. Worrying that if he simply tried to roll her over in her condition that he might make the bleeding even worse, Feral chose instead to examine the fresh blood beside her instead. It took a precious minute, but satisfied the mutant that however it had happened, Rain had somehow come to falsely believe she'd been infected.
"You're not infected Rain. Trust me, I'd be able to smell it if you were. I don't have time to figure out what exactly happened, but I'm going to do my best to fix you up. It will REALLY piss me off if I have to waste valuable resources regenerating, so try to relax and not fry me while I work on you, all right?" Feral explained, looking to his "patient" to see if she'd heard and understood him. Having lapsed back into semi-consciousness, there was no way to confirm she could even understand him at this point, so he decided not to waste any more time and just get to it.
Feral's first thought was to anesthetize the injured woman, but her weak pulse and irregular heartbeat convinced him it was a bad idea. Unable to access the wound directly, he was forced to resort to introducing metabolic enhancers and regenerative cellular free radicals from his own bloodstream into the replacement blood he was internally manufacturing to match Rain's blood-type by means of a IV-line he'd quickly created out of a just-formed blood vessel whose far end was inside the temporary blood-storage organ he'd made room for inside his own abdomen, while the other end he'd unspooled a few feet of from his right arm, then hardened and sharpened the tip into something akin to a hypodermic needle. Unceremoniously planting the sharpened tip into the vein in her left wrist, Feral began pumping blood into his injured comrade's body as fast as her system would tolerate.
There were a few tense minutes, during which the blood he replaced was being lost almost as quickly as he could produce and infuse it, but then the cellular regeneration began in earnest. Connected to her biological systems as he was, Feral could feel the ragged half-moon tears in Rain's flesh slowly begin to clot, then scab over as the deeper tissue and broken blood vessels mended. As he listened to her strengthening heartbeat and felt the increasing amount of bio-electric activity in her nervous system, the biomancer was finally confident enough to administer a painkilling compound to his slowly recovering patient. As the scabs fell away to reveal healthy unbroken skin, Feral breathed a sigh of relief. He couldn't do much more without shocking her already severely taxed body, but he was confident the woman had moved decisively from being near-death to making a full recovery in the next forty-eight hours. He was concerned about possible side-effects related to his use of his own hyper-evolved cellular healing factors, but without being able to access the wound directly it had been the only thing he could do that could help her in time. Resolved to face Rain's wrath when he explained that later, Feral hefted the by now unconscious mutant soldier over his shoulder in a fireman's carry position, and took off back the way he'd come. After carefully pulling Rain through the small tunnel in the "cork" blocking entrance to the rest of the facility, Feral took a moment to spit a catalytic agent on the edge of the metal he'd cut through. Confident that within five minutes the metal within a couple feet of the hole would be chemically heated to their melting point, Feral picked Rain up in his arms and took off at a dead run for the Gate Room, realizing he needed to get her there so he could then go back out, find the others, and eliminate anything that might prevent their escape.
As he ran the though crossed Feral's mind "No matter what, Rain is going to be PISSED when she hears all about this!" Breathing heavily, and doing his best to ignore the mounting fatigue brought on by the constant conflicts with Class-IV and 5 Metahumans and having used up so much biomass and energy in repairing Rain, Feral had to stop after a couple hundred yards run until the waves of dizziness subsided for the moment. Running on near-empty, the biomancer prayed he wouldn't have to fight or otherwise seriously use his powers again until he'd had a chance to recover. All the while, lurking in the back of the evolved mutant's mind were the first stirrings of the vampire-like instincts that he so dreaded. Shivering despite the blazing warmth of his passenger, Feral ran on.