Supporting Me, the boss theme of the Biolizard, performed by Everett Bradley and composed by Kumatani Fumie (熊谷文恵), from Sonic Adventure 2.
You fight a giant lizard thingy in a dark room with yellow water that will sweep you away the moment you fall into it. And in that battle comes this theme...and the lyrics are so distorted it's hard to make out a single word. Strangely, the nigh incomprehensible lyrics and dark atmosphere fits with the tone of the battle, and of course, with Shadow as well.
Masami Okui releases a CD after a long absence. (new theme song of SHIROBAKO)
She has sang many anime theme songs until now, and the music that I'm left in the impression most is this.