WIP: Are you a wizard or what?

Now this is part 2 of my half complete drawings, the background was done so roughly, I barely spent any time on making anything in the drawing vaguely neat. Plus a several things will be changed, but for now. This will do.

This is the scene in Deathly Hallows when the device comes full circle. Just love.

Panting and gasping Harry slowed down, skirting the Willow's swiping branches, peering through the darkness towards its thick trunk, trying to see the single knot in the bark of the old tree that would paralyse it. Ron and Hermione caught up, Hermione so out of breath she could not speak.
'How- how're we going to get in?' panted Ron. 'I can- see the place- if only we just had- Crookshanks again-'
'Crookshanks?' wheezed Hermione, bent double, clutching her chest. 'Are you a wizard, or what?'
'Oh- right- yeah-'

Note to self: Ron and Hermione don't look out of breath enough, change this!