Level 1:
Q - Deadeye: Heartseeker's range and projectile speed is increased by 25%. (!)Quest: Hit heroes with Heartseeker. (!)Reward: After hitting 25 heroes, if the first target hit is a hero, Heartseeker's initial damage is increased by 100%.
W - Merciless: If all 3 parts of Cleave Combo hit the same enemy hero and only that enemy hero, they take an additional 105 (+4%) damage, this damage is increased by 50% if that hero is your Fated Killer.
D - Facing Destiny: Gain +25% damage for 2 seconds whenever you deal damage to your Fated Killer, but reduce the damage you deal to other heroes by 20%. While your Fated Killer is dead, the damage penalty is removed and the damage bonus lasts until they respawn.
D - Fearless: (!)Gambit: Gain 30 Armor against all damage EXCEPT damage from your Fated Killer. Every death reduces this bonus by 10. (!)Quest: Basic attacks against your Fated Killer increase your basic attack damage by 0.5, upto 30. (!)Reward: After attacking your Fated Killer 60 times, your basic attack speed is increased by 30%.
D - Vision of Fate: Activate your Trait to reveal your Fated Killer for 3 seconds. Cooldown: 60
Level 4:
W - Deep Wounds: Each part of Cleave Combo resets Heartseeker's Bleed Duration. Each part that hits a single target increases bleed damage by 25%.
W - Bite of the Bleeding Hollow: Each part of Cleave Combo deals 100% increased damage to non-heroes. If only non-heroes are hit by a complete Cleave Combo, reduce its cooldown by 6 seconds and refund 35 mana.
D - Undefeated Duelist: Increase your basic attack damage by 15%, this bonus is doubled against your Fated Killer. Basic Attacks against your Fated Killer reduce basic ability cooldowns by 1 seconds.
D - Mercenary Chieftain: Increases your Damage to Mercenaries by 50% and increases the damage dealt by nearby friendly non-boss Mercenaries by 50%. These bonuses are lost while Kilrogg is Wounded.
Level 7:
W - Shred Armor: Part 1 of Cleave Combo reduces the armor of Heroes hit by 10 for 3 seconds, if only a single target is hit, their armor is reduced by 25.
W - Execute: Cleave Combo deals 25% more damage to enemies at or below 50% health, this is increased by an additional 100% when directly hit by Part 3's axe.
E - Cruelty: Mortal Strikes deal bonus damage equal to 2% of the target's missing health. While at or below 50% health, Mortal Strikes deal 50% increased damage.
E - Mortal Wounds: Mortal Strikes reduce all healing the target receives by 30% for 4 seconds.
Level 10:
Heroic Abilities.
Level 13:
Q - Piercing Throw: Heartseeker ignores armor and deals an additional 150% damage to shields
Q - Saving Throw: While Wounded, restore 50% of your maximum health if the first target hit by Heartseeker is a hero. This effect can only occur once every 60 seconds.
E - Raging Blow: Activated Mortal Strikes against heroes deal Bonus Damage equal to 5% of the hero's max HP and passive Mortal Strikes deal bonus damage equal to 2% of the hero's maximum health. These bonus are doubled while at or below 50% health, but lost while Wounded.
W - Hamstring: Part 1 slows enemies hit by 15% for 1 second, Part 2 slows enemies hi by 30% for 2 seconds, and Part 3's slow is increased to 50% for 3 seconds. If a single enemy hero and only that enemy hero is hit by the entire combo, they are slowed by 75% for 3 seconds.
Level 16:
Q - Olympian: Carry 3 charges of Heartseeker with a 3 second delay between uses. Heartseeker's damage is increased by 25% if you were moving during the casting delay.
E - Mortal Combat: While at or below 50% health, passive Mortal Strikes trigger every basic attack. Mortal Strikes' bonus damage is no longer reduced while wounded.
W - Rampage: Each part of Cleave Combo removes all slows and roots and your movement speed is increased by 20% while casting. Each hero hit by Cleave Combo reduces it's cooldown by 2 seconds, if all 3 parts hit the same hero and only that hero, the cooldown is reset
D - Survivor: While Wounded, all healing you receive from allies is increased by 50% and Mortal Strikes heal for 100% of the damage they deal, doubled against heroes.
Level 20:
R1 - Showdown: Kilrogg begins the Duel with a free Cleave Combo that deals 100% increased damage. If Duel of Fate is cast on your Fated Killer, Kilrogg instantly restores 50% of his maximum health and the Duel now lasts Indefinitely.
R2 - Death's Door: Each Slam of Death Throes now deals 25% more damage than the previous one and fires 2 additional boulders. While Wounded, Death Throes grants Unstoppable and removes Wounded's speed penalty.
Passive - Last Stand: When you would normally take lethal damage, you become Protected for 3 seconds, instantly restore 50% of your maximum health, and gain 50% increased damage and basic attack speed for 3 seconds. Cooldown: 120.
D - Fate Denied: When your Fated Killer is slain, instantly restore 100% of your maximum health and gain 50% increased damage until they respawn.
D - Kilrogg or be Killed: Takedowns against heroes that are not your Fated Killer restore 25% of your maximum health and grant you 20 armor until they Respawn. If every enemy hero except your Fated Killer are dead, increase the armor bonus to 75.
Heroes of the Storm Build Guides
While Kilrog's lower than average stats and other features do help in balancing out the benefits of the trait, it also means that the selected target is going to have to babysit Kilrog for the entire match in order to stop him from snowballing forts and skirmishes. It would suck the fun out of the experience for the unfortunate player by forcing them to constantly hunt down this one target, along with their team as there will basically be no point in trying to take Kilrog down if the Fated Killer Gets axed or doesn't show up.
It's like fighting Tracer or Lunara: Not unbeatable, just unfun.
All in all, well done. (^_^)