When Oliver awoke Constantine was gone. The only trace that he had ever been there was two new tattoos on Oliver, each for protection. A full English breakfast, still warm. (The man could cook.) And an old Roman coin on some string.
A note by it said that if Oliver ever needed him then to say his name into the coin. And that if it ever felt hot and glowed then John either needed help or was warning Oliver.
Oliver smiled and put the coin in the pocket. After last night and John's warnings about the rising Darkness Oliver knew that he would need the mage's help again.
His phone rang, Felicity. He smiled.
Thank you for reading. I hope that you enjoyed it.
I have more Constantine / Arrow crossover stories planned so please let me know anything that you would like to see.
Please review.
Disclaimer. I do not own the rights to Constantine or Arrow or any of the characters.