Stunning Nunu reduces the damage to zero for some reason. Even if you'd channeled for 2 seconds beforehand. Maybe it's a bug.

It would be a really nice buff, a huge and completely unnecessary one.

That 30% is really significant, you'd either have to increase the channel time further to allow for the 30% to build up at the current rate, or you'd have to increase the rate at which the damage builds up.

Nunu's ult is supposed to be an all-or-nothing high-risk high-reward nuke that either ruins everyone's positioning, absorbs a disable, or kills everyone.

It does its job, it doesn't need a change.

Any plans to make the ult useful?

Rick is correct

Nunu's ult scales linear to 70% of damage dealt. When you successfully channel for the full duration you deal that last 30% of the damage.

So,

If you channel for half of the duration you get 50% of 70% of the damage (35%).

The reasoning behind this is to encourage and reward players to get a full channel off.

Well currently the worst case and best case are a bit imbalanced. The best-case dmg may be too high especially considering the ap-ratio, the aoe and the additional debuffs. The worst case however is doing like 10 dmg and having it go on cooldown accomplishing nothing.
Currently it is not too rare for a team to have access to like 8 disables. Soaking up one of them accomplishes not much especially since many are aoe anyway so it is almost impossible to get off a full ult and even then hitting more than 2 people is, due to the mobility-creep, extremely rare and usually only happens if the enemy team screws up (hard).

So yea to achieve the best case you need the enemy team to:
a) not use a single cc on you, neither accidently nor intentionally
b) not move out of your ult with one of their dashes, flashes or whatever
c) group up hard to begin with

You also have to position yourself well and wait for the enemy team to use their aoe-cc so they don't "accidently" cc you.

I wouldn't mind it if his ult-dmg or ratio got reduced somewhat if they removed the 30% penalty.

Edit: Oh boy two reds already.

But wouldnt you agree that this is a little bit outdated seeing as champions like Kennen, Morgana, Nautilus, Blitzcrank, Amumu or Leona cancel the ult without even specifically aiming for it? The channeltime of 3 seconds feels extremely long. Can't we adjust the worst-case and best-case scenario to flatten the curve a little (just a little, I wouldnt want to take away the massive FK YEA feel when you hit 5 people with a full ult) to adjust to the current state of the game? Nunu's ult is like 2 years old after all.

btw: In a txt file in the gamefiles (forgot which one) his ult-description consists of "Oponn's pull and Oponn's push". Who was the guy who made this reference and why is he so awesome?
For those who don't know, it's a reference to A Tale of the Malazan Book of the Fallen, a fantasy series that is way better than Game of Thrones.

Well I know the risk is big when channeling, but anyone else thinks it looks a bit strange having a giant AoE Blizzard hidden by a bush?

It is one of the only ways to get a full ult off, you are still slowed by it when walking into the circle which is a huge indicator to get out of there asap.

I don't think I have ever played Nunu in my life and I knew this, I actually thought everyone did but apparently not

Well "barely known" includes that some people know about that. Anyway thanks for your valuable contribution to the thread.

A few more bugs with his ult:

- no dmg when knocked back (always)
- no dmg when knocked up (always)
- no dmg when silenced (appears to be random)
- no dmg when stunned (appears to be random)