Spear of Lano
It is an ancient Hawaiian artifact. Once the mystic gem is placed in the center and a line is drawn on the ground with the blade the line becomes an impassable barrier.
The Spear of Lano was discovered by Doctor Kalia. Knockout is the first to steals the Spear of Lano under the protection of Superboy. She only wanted it to start a fight with Superboy because no one knew of its power. After Knockout returns the Spear of Lano it is stolen by Scavenger.
