Cas: W-w-what do you want!?
"Shard..."
He slowly took control of Cas's arms, moving his arm up to Cas's neck
Cas: NO! IT'S MINE!
He jerks his arm away, eyes going red again
Cas: Get the fuck out of my body...
Cas: Ngggg-
It's clear that fighting Redd is taking a lot out of him
"...no. I need more shards."
Hed caused Cas to slam into the wall
Cas: AUGH!
He rubs his head, momentarily distracted
He quickly moved his hand up and removed the shard from Cas's neck with brute force
Cas: AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHH!
He passes out
"..."
He floated out of cas's body and grabbed the shard, inserting it in his own neck, wincing a little.
Cas gon dieeeeeeeeeee
"Hm..now replace with weaker shard.."
He took a plain white shard and pushed it into Cas's neck
Cas goes limp