Once yuumi's ult is activated there is no way to stop it, should it be like that. Was playing against a yuumi as nami and neither the bubble or wave would stop it, so instead of me and my adc being able to counter we ended up stunned from her ult and then vulnerable. At first I thought somehow i missed or something. If she truly is safe from everything while attached then shes beyond op, and needs immediate adjustment.
Can't stop a Sona ult either. The difference with Yuumi is you get plenty of time to run or just stay and kill her/her carry. You don't get either of those options when Sona ults you.
Gangplank ult stops it, it's the ult that just keeps on ulting.
That said, can't stop Gangplank ult.
if Yuumi is attached to someone her ult cant be stopped but if she is detached her ult can be interrupted by ccing her. also, Yuumi's ult isn't a stun its a just a root with damage, in fact, the first hit from it is it's strongest, being hit more by it does half the damage of the first.
