Summon Chicken? Sounds like a thing to help you in battle. Maybe a ghost chicken from Raven's Cove comes to help you defeat other ghosts on Raven's Cove
I can just see it now: Chicken, HP 1000, Chicken scratch, -20. -Rage ghost screams and flees with ghost chicken clucking and running after it-
I am the fierce chicken, hear me cluck!