Morgan will be the one drawing the circle; she's seen a proper summoning circle for an angel in English and Mandarin - translating it into a fairy language is pretty straightforward, if she picks the right fairy language. And she does, because she knows six and can pick and choose. Maybe Legend could copy this summoning circle, but he won't be able to reverse engineer it.

As she's drawing, "There is an element of summoning I forgot to mention, that may or may not apply here." Draw draw. "My Earth has an afterlife. Non-summoners go to a place that's rather boring upon death and cannot be summoned, but get comfortable immortality and can easily interact with all other deceased non-summoners. Summoners become daeva. This is almost completely an upgrade, but it does almost universally mean separation from loved ones in the afterlife, unless aforementioned loved ones are the exact same type of daeva that you are."