"I can bring him there, if there's a big enough shadow." He doesn't wanna be stuck in umbral space with him. On the other hand... He ducks down into the shadows, and a small mass of darkenss slides over the ground. It moves sporatically, trying to get the little Rex's attention and it does.

The baby starts trying to catch the shadow as it heads in the specified direction, towards an alley.

Shad then pulls the Rex in and brings it towards the place that Martin specified. Or close to it.

After about ten minutes or so, the kid returns.

"You were right. He liked that idea."