When Velgoth told Evan about the people from the Origin Universe, he knew that the ones coming to capture him would be at the very least Rank Five Core Evolvers.
Although his powers were off the charts compared to others at the same level, he knew it would be impossible for him to face the people of the Origin Universe with his powers alone.
If he wanted to deal with them, he needed someone of the same rank.
Since that was the case, he simply decided to summon one using his authority— Realm Guardian.
---) Realm Guardian (Authority): Upon activation, you can randomly summon one of the Guardians of the Primordial Shadow Realm for five minutes. This authority can be used once every six months.
Evan had received the Realm Guardian authority when he broke through to Rank Two in the Tomb of the Ancient.
It had only been around four or five months since he last used this authority, and there was still about a month left before he could use it again.