How much you want to bet that Mara Lohk (Void Child?) is Wally saying kiddo?
Like, there was that zariman tablet that asked what is "The Wall?", with the answer being Ku Noma Elu Ra Kah, Mara Lohk.
Considering that wally likes to end things he says to us with kiddo, i have a decent feeling that could be what mara lohk represents