You can tame a beast the moment it stops thinking of you as its enemy. In your case, the Wyvern grew tired—it let its guard down, just for a heartbeat. That was enough for your power to take hold. And now," she pointed at the creature, "it's one of your beasts."
Nolan looked back at the Wyvern, pride shining in his eyes. "Yeah…" he said softly. "Mine."
The Wyvern flew up to the other thirteen Wyverns and called out to them. Nolan kept watching closely as, one by one, they descended and bent their heads toward him in submission.
"It looks like as it evolved, it became larger," Nolan said in awe. "Wow… so it means now the fourteen Wyverns serve me."
In that moment, Nolan and the newly evolved Wyvern began to shine with a golden light. The thirteen older Wyverns lowered themselves even further, as if declaring him their master. Then, all of a sudden, they were tamed—without Nolan even using his skill directly.
"Wait… it looks like they are already tamed," Nolan said in surprise.
