Jason — Euron’s priceless gift will be the Sand Snakes (taken captive), not Dragonbinder
Dan McLain

Didn’t Euron say 'invaluable gift’? This sounds a lot like a Dragon to me, which is why the Horn makes sense. The Sand Snakes woukd also qualify (but can someone enlighten me what hints to them?).

Tyrion, however… I think the wording is not fitting for that. Invaluable gift…

I think it has to be more of an instrument, whereas Tyrion wields his speech like an instrument but he can hardly be used himself.