Poppy rework

I was thinking about an interesting change to Poppy's ult that I thought was worth considering. Make her ult a true dueling tool which is what the intention was I believe.

Keep the damage increase for Poppy as it is now, but extend all the protection Poppy gets to the enemy as well. And make it so they can only attack each other. So it could read:

For 6 / 7 / 8 seconds, Poppy deals 20/30/40% increased damage to the marked target. Poppy and the target can ONLY attack AND take damage from each other. And are untargetable to all allied and enemy, champions and towers.

So that means the enemy would not take damage from anyone on your team or your towers. And no support heals or shields for Poppy or the target. It is just a 1v1. Nothing else can get in the way or interfere. It's just Poppy and the enemy.

Now I would be very open to changes on the damage increase and the duration. But I think it would be a really, well, diplomatic to extend all the protections Poppy gets to the enemy. And would make for very fun, interesting and most of all unique gameplay opportunities.

Now the biggest problem I see with this ult is communicating all that to the enemy player. But I know it would be possible through fading somethings or highlighting others or something like that.