Night Thrasher chose the other teammates: mutants Firestar (filling the Human Torch slot) and Marvel Boy, later known as Justice, (filling the Invisible Woman slot). Soon after assembling, the four young superheroes became involved in an emergency. Terrax, a former Herald of Galactus, had re-formed his body and was causing destruction in downtown New York. Arriving at the scene, they found Namorita and Speedball. The six young heroes battled Terrax and neutralized him via the use of ad hoc (but effective) teamwork. In the aftermath, the Avengers arrived and stole the show, leaving some of the young heroes bitter. They agreed to form a new team, the New Warriors, after a label given them by a reporter.