Skadi, the godness of winter

I think that 5% chance on the passive is a bit too low. I think it'd be a better passive if all your auto-attacks slow enemy movement by 15%

The skis should also give her a small movement speed buff.

Also, the increased amount of magical power gotten from the ultimate is ridiculous. I think it'd be more effective if the ultimate was a toggle on a 10-20 second cooldown as opposed to a 90 second cooldown. It'd make her great at farming, as her other abilities are lacking the damage to allow her to farm

That could be really annoying though, maybe a 10% chance to slow enemies for 15% for 3s, that sounds reasonable.

15% slow is nothing. Another LoL comparison, but Sejuani in LoL used to have the same passive and it was considered a weak passive. Chance based skills are a big no-no in MOBAs.

In my opinion, 5% is too low, I mean, 1 out of 20 hits will slow and you are a Mage that doesn't rely on basic attack (except Zeus and Isis) if you want 5% I think the slow must be above 50% or maybe 100% chance but only 5-10% slow. Ymir 3 and 2 does damage and stun and slow for 99% chance and 35% slow.

I've buffed her passive and nerfed her ultimate.

Keep the ultimate cooldown the same. 120 seconds is too long by this game's standards.

Also, not targeted directly at you, but anything that relies on a percentage that cannot be altered and nothing else is deemed as bad game design, as the ability is unreliable and a complete pain in the *** to balance out. It also ruins any strategic decisions that involves it as instead of "When I do this, then I can do this" it becomes "I hope it does this, so I can do this, or else the rest will be ruined". In this case, the guaranteed slow will help her land her abilities easier. In a way, the passive you have made rewards luck as opposed to skill.

Then what about every basic attack applies a 15% slow.

Up to the OP to decide. I'm just here to give my two cents on god design.

Yeah. That's true.