Twilight remembers a powerful being she met once before. Away from the rules of Everglow, perhaps a little summon wouldn't cause much harm? At the worst, nothing happens. At the best...
This is a crossover with the Ponyfinder universe and takes place during the same timeline of most of my other crossover fics. Twilight has already been to Everglow and back (twice!). Finally relaxed in her own castle, she can consider her part in this greater cosmology.