Supergirl #12 (The Reign Of The Superboys)

The conflict in Kandor between the Science Council and the younger Kandorians is only growing more tense. Supergirl's first run-in with the rebel leader Black Flame ends with her broken and without her powers, forcing her to seek recovery with the Science Council. But despite Supergirl's warning, the Council has their own plan to stop Black Flame: a powerful clone capable of taking down anyone in their path.

Enter Team Thunder!