In New Warriors #6, the New Warriors meet the Inhumans...!

Gathered together, before the Inhumans, Star Thief explains his origin, telling them that once, he was known as a man called Ditmil Pirvat, native of India. However, tragedy struck like a lance from the gods! His car was incinerated, his family instantly slain – he, however, was not so lucky. His flesh fluctuated between decayed flesh and Cosmic energy. A containment suit was made to keep him alive. He learned that it had been an experimental satellite ozone analyzer that had gone awry (it was mentioned in issue #5).

When they learned the rocket was headed for the city on the moon, they began moving to put a stop to it – except for Star Thief, who exploded with energy, claiming that the city on the moon must be destroyed!

With a blast from Black Bolt, Star Thief goes spiraling into the ground… Namorita is the first to reach him, but Star Thief is too quick, and turns to grab her – only a telekentic shield from Marvel Boy saves Namorita from being fried alive. Gorgon is the next to pounce on him, which forces Star Thief to release his hold on Namorita. Karnak follows through with a kick, which leads Star Thief into Medusa’s living hair – which finally sends him down into a deep, dark shaft… there, they find Star Thief suspended in a energy bubble, held in place by none other, than… The Watcher.

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In case you had not heard, the complete run of New Warriors (volume 1) - all 75 + the 4 annuals are finally available to read on Marvel Unlimited.