"Just...don't move. Either of you." Another nod and he places his hand on to Jack's shoulder, gripping tightly to keep himself centered. His other comes up to rest against his stomach, though he doesn't move just yet. Instead, he casts a brief look between the two of them, stopping longer with Jack to mutter a quiet apology for what he knows will follow.

It's only once he returns his attention to his own hand that he finally presses forward, seemingly sinking through flesh and bone unhindered. There's light; bright, but bearable. Heat, from the light, the effort. But above all, there's exhilaration, even as he knows that Jack will be feeling the exact opposite. To Castiel though, it's that draw of power, that strength of Jack's soul; it's everything he both needs and wants, and nothing is going to stop him from gaining it.