@JPANIME i think he mentions something about concealing his ability to create elixirs in an earlier chap because it's an even more absurd ability than pretending to simply be an "OP summoner". Keep in mind that everyone still believes these humanoids are legitimate summons that are just able to polymorph and not genuine beings that were actually created entirely by Akira. His power is basically creation magic with near zero limitation and if that was found out it'd be an international crisis/war to seize his power for a single nation, meaning all of his loved ones would be targeted and used as leverage. That's why him and Aria are trying to keep his true abilities hidden under the mask of "OP summoner"