"Mrrrrrgggghh!" It'd be an impressive war cry if Eden hadn't done it through a mouthful of feathers and grit teeth. Fangs sinking into the hard bone and soft flesh, the vampire stays latched on like a particularly dangerous parasite. Little by little, she feels skin tear and the beast itself shriek in pain. Its path of flight becomes erratic as the rhythm of its wings becomes misaligned. The wing itself is too large to tear off completely, but at least Eden has seriously crippled it. Egged on by the taste of blood and the prospect of feeding on a beast so large, the vampire's instincts take over, fangs becoming more vicious as she grabs the base of the wing with one hand and the appendage at the other, pulling with a considerable cracking noise. A horrible noise, of something breaking that is not meant to break.
It's then that the griffin rams Eden into the wall, but by then the damage had been done. Even as she falls to the ground, stunned, the beast itself can only move the injured wing with painful, jerking motions. It can no longer fly.
Eden herself doesn't seem to be in much better shape, however. Vampires are tough, but even being momentarily crushed will put her in a daze. From her place in the ground, she stirs, her tongue licking some smatterings of blood on her face, but the vampire seems to be at the mercy of the griffin now.