Crossover with Percy Jackson.
SwanQueen
I did some research.
Emma is a Halfblood and went to Camp Halfblood then joined the hunt, graduated and moved to the city where Henry finds her. Emma was best friends with Annabeth and Percy and joined them on there quests. Emma is still in the hunt. Emma's parents are the Charmings. Emma is related to Artemis. A long time ago Before Artemis made her vow, she had a Demigod child. Threw generations, the knowledge of this disappeared. This was how Snow is good at archery and can talk to animals.
When Emma comes to Storybrook, she starts to fall for Regina. Emma still takes part in the hunt. Emma realizes that Henry also has Demigod blood in him and is not sure what to do about that fact. Should she tell Regina? Would Regina believe her? But what Emma doesn't know is that Regina was the Evil Queen.
Monsters can still get threw Regina's barrier around town.
Emma has a silver bow and arrows.
Artemis gave Emma one of her three dogs. An Arkadian breed
What will Rumple do if he finds out?
Does Regina have Demigod blood in her because she has magic?