[Ability Concept]: Nunu's Snowfort
[Concept#1]: Nunu can create Snowforts out of Structures, FORTIFYING them & increasing their defenses.
[Concept#2]: Nunu can create an enchanted/True Ice fort that's treated as impassible terrain (Think Yorick Cage). Enemy auto attacks can be intercepted by the walls of the fort, similar to Braum's E. The Walls of the Fort have Hit points similar to Yoricks cage and can be destroyed once the hit points are depleted.
I got these Ideas after re-reading the previous Champion Roadmap. One of the goals for the Upcoming Nunu VGU is to "Capture the feeling of your very first Snowball fight". I thought "Can't really have a Snowball fight without a fort."
Concept#1 can be used to delay Enemy Sieges & buy time for your team to regroup at the Turret. Also, this would make Nunu a great pick since Turrets aren't as Strong as they used to be.
Concept#2 is a little bit more complex, but I can see this being a Fun & somewhat strong ability to play around. In Skirmishes, you can drop a fort around an ally to protect them from enemy Auto Attacks. Unlike the first concept, this ability can be used anywhere as opposed to being exclusive to turrets. I originally wanted to make it so Allies couldn't take damage from skill shots, but I felt like this could have made the ability a bit too powerful (It'd be like a windwall...no one likes those..).
What do you guys think?