"Imagine the two cards you have within you. But not their physical form, but rather, their 'magical' form, if you wish to call it that. Imagine the power they bestow upon you in the form of a physical, tangible thing." Lognir said in a clear tone while Eiro was meditating on the ground. The Demon did as told, although this step wasn't particularly tough yet.
It was similar to handling certain sorts of magic, so it wasn't really that bad. But the point of this was to get to the source of the 'card vibe' that other card holders could feel, so that Eiro could filter it out of his aura. That way, even when he would let others see his regular strength, he could still hide the fact that he was a card holder himself, just like that Crow monster was able to do back then.