Valiant Comics 1992-95
Hard Corps #13
The Body Farm – Flatline is taken prisoner by the Harbinger Foundation and the other psi-borgs launch a rescue strike. During the battle, they find their artificial Harbinger powers behaving erratically. Barely saving Flatline, they make a hasty retreat while Superstar holds off their pursuers. But, his invulnerability unexpectedly fails and Superstar dies in a hail of bullets.