One jumped up and attempted to fire a containment spell at Hermione. Ropes uncoiled from his wand and raced towards her, but the ring responded again. It sent out a gout of fire, which manifested into a flaming dragon head and incinerated the ropes before they got anywhere near. The second guard fired off a Stunning spell in his panic. That was a mistake. The ring simply pulled Hermione’s hand up and absorbed the jet of red light, concentrated it, then sent it arrowing back with ten times the original force.