Shadowhunter/supernatural Crossover [Discontinued]

Dean and Sam meet the shadowhunters and find out they're shadowhunters them selves! what happens when the battle they fight is with a whole bunch of teenagers and a half vampire? will they get along and win? or will they be enemies and lose? Don't forget at the same time castiel is facing Lilith! so are the others.. and clarys mother has been gone for 2 years. leaving clary with jace and the lightwood family.