Kel'thuzad by Koetetsu

Tier 1

Freezing Nova (Quest) - Damage heroes with Frost Nova's area damage. (does not count the primary target)
Reward: Enemies damaged by Frost Nova are rooted for 1 second.

Permafrost (W) - Frost armor grants a stack of block after expiring that reduces basic attack damage by 50%. Can have up to 2 stacks on the same target.

Zombification (E) - Minions that die while plagued are reanimated as zombies that have 50% of the minion's health and damage, the zombies continue to push a lane as if they were regular minions.

Tier 2

Glacial Lance (Q) - Frost Nova's primary target is tossed into the air for 0.75 seconds and takes 50% more damage from the ability.

Sap Vitality (W) - Allies that take damage while shielded are healed by 75 (+4%/level) damage. This effect has a 1.5 second cooldown.

Glaciate (Q) - Frost Nova can now be cast on a target location and deals the area damage in a 15% larger area and with 30% more damage but disables casting on individual targets.

Tier 3

Dark Ritual (Active) - Sacrifices a lane minion to restore 100 (+4%/level) Mana. Stores up to 2 charges.

Ice Crown (W) - Shielded units also apply the slow effects to nearby enemies.

Cripple (E) - Plagued enemies deal 25% less damage for 5 seconds.

Tier 4

Death and Decay (See Heroic Abilities)

Freezing Chains (See Heroic Abilities)

Tier 5

Trail of Frost (Z) - You leave behind an icy trail that slows enemies that move on it by 20% for 3 seconds. The trail lasts 3 seconds.

Icy Veil (W) - Frost Armor grants a spell shield upon expiry that reduces ability damage taken by 30% for 3 seconds.

Cult of the Damned (Active) - Summon an invisible shade that you can command to provide vision in a designated area and reveals invisible units to you.

Tier 6

The Scourge (E) - Deals 0.5% additional health damage or healing per second for every 15% health missing from the plagued target upon casting. Stacks up to 3% health lost/restored per second.

Majordomo (W) - When taking damage below 50% health, you automatically cast Frost Armor upon yourself for free and increases frost armor cast range by 25%.

Arc Lich (Trait) - Allows casting of abilities while Channeling.

Tier 7

Rebirth and Renewal (See Heroic Abilities)

Chains of Kel'Thuzad (See Heroic Abilities)

Lich's Phylactery (Trait) - Drops a Phylactery upon death that can be picked up by an allied or enemy hero by channeling on it for 3 seconds. If picked up by an ally, your death timer is reduced by 20% and you will revive at your ally's location, if your ally dies you will revive at the hall of storms instead. If picked up by an enemy the phylactery is destroyed and increases your death timer by 10%.

Frost Breath (Trait) - Activate your trait to channel a cone of frost that deals 171 (+4%/level) damage per second for 3 seconds that slows enemies hit by 25% for 2 seconds. The direction of the cone changes with your cursor position.