I have bound Odin's power once before, and I can do it again. He means it, and there is complete, confident certainty in his telepathy. Granted, he would have Frigga at his side in this world and that would make it way harder, but if he had to, he would make it happen.

I know the Allfather's secrets better than anyone living, save, perhaps, his wife.
Are you quite sure you wouldn't prefer to cooperate with us? If we're quiet enough about it, no one need know Laufey is dead.

The telepathy is cloying, pleasant and conversational, but that same poisonous darkness continues to creep from him, seeking to entangle her mind.

Loptr puts a hand on Loki's shoulder, bracing him, then reaches over to touch the hand that seems to be plaguing him. "You've been cursed. Follow the pain; accept it and seek the source. I think you will find her to be the cause. Hunt it out like you did Snorri."