Percy Jackson and Ben ten crossover

Ben is the demigod son of hecate

When is the demi goddess daughter of (up to you)

Kevin is the demigod son of Hephaestus (his metal ability)

They join Percy at camp Jupiter

Ben has magic

Gwen has a watch that allows her to change into monsters,

Kevin has his powers

Pairing is Gwen x Kevin

Ben x choose

Leo
Nick
Jason