Until now, Ethan was only focused on purifying the Berserk Beasts into Spirit Beasts. He had no plans of bringing them out of the Berserk Beast Realm.
Even if he had, he couldn't do it openly in front of Elder Wren after knowing the true purpose of the Berserk Beast Realm for the Greenfire Sect.
Before meeting Shadow Bee, his plan was to occasionally visit the Berserk Beast Realm every now and then, purify the Berserk Beasts, earn some Life Points, and quietly leave the Secret Realm.
However, he realized he couldn't follow that plan because after purifying them, the Spirit Beasts were losing their lifespan, and if a purified Spirit Beast turned into a Berserk Beast for the second time, purifying it might kill the Spirit Beast.
Just when Ethan was racking his brain on how to really save the Spirit Beasts, he heard Shadow Bee's words about bringing them all out of the Berserk Beast Realm.