If you ult while under a tower and someone walks into the zone, You take tower Agro, after you take agro Zhonya's and the tower will keep agro on you without changing targets for the duration of Zhonya's. after agro will remain on Anivia.
Yes, that's more due to the changes to towers 2 patches ago though. She's still damaging them, so she keeps aggro.
When you use an ult near a tower, or any attack really, and an enemy champion is nearby, you will be targeted.
not while in stasis when you go into stasis as anivia the tower should change agro to new target.
