When Flood leaped towards her she was prepared, countering his attacks. However she could see his plan and that it was working; she hadn't planned on relying on her magic but if needs must. Landing a blow to his chest, it was accompanied by a blast of magical energy which would send him flying back, though cause no pain or damage of it's own accord. 

And then the room was black. She fell still and silent, and closed her eyes (after all Nicholas had shouted out their plan and the room was dark anyways). She felt the vines begin to snake around her legs and then a brief but intense burst of light. Well, there was the flash. Bending down she wrapped her fingers around the vines. In the darkness they would not see the blackness which seeped into the greenery, how it corrupted from the inside out. The vines shrank away and the help from Kalinda was the last step as she kicked herself free.