Regarding the problem with the Elders, the three of them would be sent back to Andelus continent after two years, during that time, they would be their 'guests' here.
This timeline would prevent them to mass their power and followers, it would weaken their influence too, but they couldn't outright kill them, since it would incur the wrath of the Holy Kingdom people and they were at the position, where they couldn't afford another battle.
This was the safest way to move forward, at least for now.
As for Abby, originally she decided not to go back to Andel Continent, but if she changed her mind, she would return along with the elders after two years.
But, now she said she was going to go back. This made Iris frowned. Her mind started to think what she was up to, but Abby smiled to see her guarded expression.
