Izzy saw the troll's fat lumpy hand heading for Jace as he tried to cut the creature and sent her whip flying out to wrap around it. With a sharp tug the creature howled as it's hand was severed from it's body and Jace's knife sliced it's stomach.
Swinging the blood stained whip through the air she cracked it across the creatures face hitting it's eyes, hopefully effectively blinding it. "Clary, are you okay?" she said, moving around the creature to check on her friend leaving Jace to finish it off. They worked well as a team, though she'd thought - more than once - that they weren't complete without Alec.