Nightwing
Nightwing is a fictional superhero appearing in American comic books published by DC Comics. The character has appeared in various incarnations, with the Nightwing identity most prominently being adopted by Dick Grayson when he moved on from his role as Batman's vigilante partner Robin.
Nightwing
Batman then entrusts Nightwing to alert other heroes about the danger that the Crisis poses. Dick flies to Titans Tower, but due to the chaos resulting from the Blüdhaven disaster, the OMAC onslaught and other Crisis related events, the only hero who answers his call is Conner Kent. Together, they locate and attack Alexander Luthor's tower, the center of the Crisis, only to be repelled by Superboy-Prime. Prime is ready to kill Nightwing when Conner intervenes, sacrificing himself to destroy the tower, ending the destruction of the Universe.