If it's to Ukraine, I'd be hoping it's Dynamo Kiev or bust.
I don't see Shakhtar taking him on as they already have 3 or even 4 attacking options I'd rate higher than Larin in Fred, Marlos, Ferreyra etc. Plus they usually only play with a single striker up top, and there's no way he's taking any minutes away from Ferreyra, or even any of his understudies. Would just be Besiktas 2.0 log jam.
Dynamo Kiev would be extremely intriguing however. They lost Yarmolenko to Dortmund a few months ago. If Larin joined right now he'd instantly be the second best attacker after Junior Moraes, or even a 1B...I could definitely see him taking some of his minutes away or even playing alongside him in a different formation. Kiev also is in Europa league, and just drew AEK Athens away in the first leg, so they have a real shot at advancing.
Any other team in Ukraine would be a step down from MLS and just a waste of time. There is a massive drop in quality after Shakhtar and Dynamo Kiev.