Carlos winces when a figure with wings, horns, and a tail appeared in front of him with flashing lights. When he finally opened his eyes, he was shocked to see you ( not like he looked very shocked though, it was just his normal expression + his eyes widening a little ).

"Are you the devil ?"

Was what he was thinking. Carlos was decoding some ancient relics and he couldn't read that the title of the chant was to summon the devil.