Nightwing and Flamebird

Nightwing and Flamebird are a pair of Kryptonian gods who have inspired a number of superhero teams.

Legend
The true Flamebird is a massive, flaming dragonlike creature from deep in Krypton's past. The bird's partner is Nightwing, who is also its mate and opposite.

Among the early Kryptonian Gods, Flamebird was charged by almighty Rao with constantly refreshing the world by burning down the new creations of her brother, Vohc-The-Builder. She did so, but there was no hostility between the two; Vohc was grateful that Flamebird constantly pushed him to reimagine his works. The two dieties were in love for a time.

However, to help his friend, Nightwing, Vohc made it possible for him to meet flamebird. As such those two fell in love. Vohc's next creation was a monument representing all of his love for Flamebird. While Flamebird truly admired and appreciated the work, she fulfilled her duty to Rao by burning it down. This time Vohc actually begged for this work to be saved, but Flamebird ignored him. This destroyed much of Vohc and changed him into Vohc-The-Breaker. (Comic Series: Action Comics)

In each cycle, the Nightwing and the Flamebird are reborn, and must find each other. Also in each cycle, they are betrayed by a friend and killed.