
Specialist · magic (AP) damage
Later items show higher win rates partly because games that last that long are usually already being won. Compare items within a slot, not across slots.
Domination
Electrocute
Dark Harvest
Hail of Blades
Cheap Shot
Taste of Blood
Sudden Impact
Sixth Sense
Grisly Mementos
Deep Ward
Treasure Hunter
Relentless Hunter
Ultimate Hunter
Sorcery
Summon Aery
Arcane Comet
Deathfire Touch
Axiom Arcanist
Manaflow Band
Nimbus Cloak
Transcendence
Celerity
Absolute Focus
Scorch
Waterwalking
Gathering Storm

Based on 4,657 games · 50.8% win rate · High elo · patch 26.20.
Later items show higher win rates partly because games that last that long are usually already being won. Compare items within a slot, not across slots.
Domination
Electrocute
Dark Harvest
Hail of Blades
Cheap Shot
Taste of Blood
Sudden Impact
Sixth Sense
Grisly Mementos
Deep Ward
Treasure Hunter
Relentless Hunter
Ultimate Hunter
Inspiration
Glacial Augment
Unsealed Spellbook
First Strike
Hextech Flashtraption
Magical Footwear
Cash Back
Triple Tonic
Time Warp Tonic
Biscuit Delivery
Cosmic Insight
Approach Velocity
Jack Of All Trades

Based on 223 games · 39.0% win rate · High elo · patch 26.20.
Later items show higher win rates partly because games that last that long are usually already being won. Compare items within a slot, not across slots.
Resolve
Grasp of the Undying
Aftershock
Guardian
Demolish
Font of Life
Shield Bash
Conditioning
Second Wind
Bone Plating
Overgrowth
Revitalize
Unflinching
Sorcery
Summon Aery
Arcane Comet
Deathfire Touch
Axiom Arcanist
Manaflow Band
Nimbus Cloak
Transcendence
Celerity
Absolute Focus
Scorch
Waterwalking
Gathering Storm

Based on 150 games · 42.7% win rate · High elo · patch 26.20.

Nunu increases the attack speed and Move Speed of Willump and a nearby ally, and causes Willump's basic attacks to damage enemies around the target.

Willump takes a bite out of a minion, monster, or enemy champion, dealing damage and healing himself.

Willump creates a snowball that grows in size and speed as he rolls it. The snowball damages and knocks up enemies.

Nunu throws multiple snowballs that damage enemies. When he's finished, Willump roots any champions or large monsters that were hit by a snowball.

Nunu & Willump create a powerful blizzard in an area that slows enemies and deals massive damage at the end.
W Biggest Snowball Ever!Roottenacity helpsFROM
E Snowball BarrageSlowignores tenacityFROM
W Biggest Snowball Ever!
E Snowball Barrage
R Absolute ZeroSome of their lockdown (airborne) ignores tenacity, so you dodge it; you can't cleanse or Merc' through it.
Tap or hover a crowd-control type to see which ability it comes from.