The Abomination fled from the Origin Realms after the Agreement had been completed. It knew that at the moment, it was the best target among everyone here.
Eos could not be attacked, not yet, until they had taken over all the Origin Realms and ensured that they could not be used to expand Limbo. They had accepted this compromise because it favored them more than it would have favored Eos.
The fool had the chance to end the war for a long time, but the price had been too much for him to pay, and he had left this weapon aside for another. The Abomination did not believe that Eos would be able to consume all of these Origin Essences in a short time, even the twelve billion years given was still too short.
