He either forgot one or he deliberately withheld it so if he won't tell you... I will.
Hym "The 4th level of disguise is this... I am."
Iam "Huh?"
Hym "Huh? No not you. The 4th level of disguise."
Iam "What?"
Hym "THE 4TH LEVEL OF DISGUISE! I'M EXPLAINING IT."
Iam "Oh! Well, what is it? I want to know."
Hym "It's 'I am.' I just AM this now. That is reality. I am this. That's the disguise."
Iam "Ooooooh... Wait! Am I a disguise!?"
Hym "NO! Well... No. I mean... You're not me. Hey, I donno, KINDA."
Iam "Oh... Ok. Well... We're out of coffee. So..."
Hym "Oh. Well, get me something while you're out. Get some Kombucha!"
Iam *Sigh* "You know you're not like it-"
Hym "DON'T CARE! THE TASTE IS WEIRD AND THE CARBONATION IS GOOD! KOMBUCHA OR DEATH!"
Iam *groan* "Yeah, just don't complain when I-"
Hym "I'M GOING TO COMPLAIN!"
Iam *Sigh* "Alright."