Tang Shaoyang wanted to show off a little bit to Rumru and checked his spirit lists. Afi, Zara, and Vandir were back on Earth, and he only had Avyn and Doombringer, the uncontrollable behemoth on Archaic Spirit. The behemoth was out of the question, not just because its size was too big. That disaster might even try to destroy the city. The last strongest spirits on the list were Radiance the Frostbringer and Rumru The Black Dragon.
"Do you want to have a little bit of fun, Avyn? Or nah?" Tang Shaoyang asked the Last Kankara'Xeo. He asked instead of summoning her directly because it was unnecessary to summon her. Even without her, this group posed no threat to him. He just wanted to show off a little bit of how strong he had become to ease Rumru's concerns.
[Let's do it] Avyn answered with no hesitation. It was a little bit of fun, warming up before they faced The Gods of this world.