He just growls, starting to get closer
(We all know he's actually about to piss himself-)
"Grrrr..."
He gets on all fours, pacing towards Baku menacingly
He's a big boi in this form, so he paces on all fours up to Baku, fangs bared, growling.
He stops suddenly, trying to hold himself back. He's shaking a little from the effort.
The blackness starts to swirl around his legs. He's shaking, trying to hold still and bring himself back to normal so bad...
"Grrrrrr..."