Hellwave

Hellwave is the slash ship between John Constantine and Mick Rory from the Legends of Tomorrow fandom.

Canon
DADDY DARHKEST

John walks onto the bridge of the Waverider, and Mick asks Sara why Rip isn't in prison. Sara tells him that this John Constantine not Rip, but Mick says they're both skinny brit's in trench coats so they are. John goes on that he's an accomplished warlock and master of the dark art. The whole situation get's too weird for Mick and he leaves.

NECROMANCING THE STONE

Mick stares at the flame in his hand created by the fire totem. Constantine notices it and asks for a light for his cigarette. He light is before Mich can respond.

Fanon
Shipping between the two is rare. However, there were those shipping it before they interacted, or before the announcement of Constantine being on Legends. Many also hoped to a scene of John using one of Mick's lighters or his heat gun to light one of his cigarette's.

Fandom
AO3