He would keep up the charade, try to hide things from the dragon, and lead him off on false leads when he ‘discovered’ more about what he was after. He’d make him think that the secrets that he was really after was some -obscure alchemical formulae, or odd and forbidden magics, or hell, even necromancy, which Crimson reliably told him didn’t exist despite animating the corpse of an undead dragon that he had killed himself... Handy didn’t get magic sometimes. In any case, he would feed Spike anything other than the truth about Handy’s interest in the veil and breaking through it to get back home.