Tonks faced the opposite way from Luna, so that they could get all angles of a possible attack. Flash after flash of bright red light came from her wand, along with the incantation Stupify. It worked, seemed to knock the lizards back.
Unfortunately, as she was dealing with one, another one darted in. It's claws barely missed her abdomen, and she jumped back only just managing to avoid being cut. "Marcus!" Several more of the creatures were closing in, and she had no time to cast a protection charm.