Cas nods
Cas: Yeah...
Cas: ...energy...a lot of energy...it-it's actually kinda exhausting...
Cas: H-how...?
Cas: O-ok...well-
He starts morphing into different animals, slowly at first, but faster as he gains more confidence. They get bigger and bigger, periodically he turns into fantastical creatures like dragons. He starts going so fast that Elden can't even keep up
(Adios amigo! GASPPPPPPPPPPPPPP-SIMPS COMING BACK TOMORROW YEAHHH BOIIIIIIIII! Ok bye, see ya tomorrow!)
He starts slowing down and periodically morphs back into his human form, grinning at Elden
Cas: Woah-I-I feel great! I-I never knew I could do this!