Kael'Thas remains one of the strongest Heroes in Heroes of the Storm. His ability to deal enormous damage, especially after level 16, mean he can pressure an entire group and deal so much damage that wiping several players at once is a common occurrence. His ability to chain attacks together, combined with his damage over time burning make him a formidable enemy.

The one limitation to Kael'Thas is that similarly to Jaina, he's incredibly squishy. So much so that if Nova or Valeera are on the enemy team he'll spend a great deal of time looking over his shoulder trying not to die. Unsurprisingly, positioning is incredibly important for Kael'Thas because unlike Jaina, he only has Gravity Lapse to prevent enemies reaching him. If he misses this, over extends or doesn't have protection, he's going to die. 

Updated: 24 June 2017



Eye watering damage AOE damage

Very squishy without a pocket healer and strong front line

Excellent area denial thanks to his Phoenix Heroic

You'll need to learn your positioning to be truly effective 

Is a powerful pick for any team composition

He's mana intensive early game

Can wipe entire teams if they're silly enough to group together 

I'd consider that, similarly to Jaina, he has a high skill cap to truly maximise his potential


Verdant Spheres (Trait) - Activating Verdant Spheres causes all your abilities to become more powerful. Considering its short cooldown, you'll also have it available most of the time. Each of your abilities, when empowered by Verdant Spheres, become stronger. Flamestrike is larger, Gravity Lapse stuns and Living Bomb has no mana cost or cooldown. If you can, I'd recommend you use Verdant Spheres for Gravity Lapse as the combination of its stun, followed by Flamestrike and Living Bomb. 

Flamestrike (Q) is a powerful AOE that deals high damage in a somewhat small area. With Verdant Spheres activated the radius is increased by 50%. Ensuring that you use Verdant Spheres with Flamestrike is incredibly important for your spike damage, especially against a close group of enemy players. On Battlegrounds which require objective interaction, the wider radius from its Gravity Lapse is fantastic. Best of all however is the use of Flamestrike when talented: its damage is eye-watering. 

Living Bomb (W) - applies a very strong damage over time effect onto a player that once consumed, detonates and spreads Living Bomb. Combined with Verdant Spheres, you can use Living Bomb twice (but not on the same target) allowing you to quickly spread your DOT. Best of all, the free mana cost of the cast provides some much needed sustain and still ensures you can deliver damage. If you can, it's sometimes worth double-spreading Living Bomb to pressure the enemy team as much as possible. 

Gravity Lapse (E) - Your only defensive skill, Gravity Lapse stuns the first enemy it hits for 1 second. If you boost it with Verdant Spheres it'll stun 3 enemies hit and increases the duration by 50%. The ability to hold multiple players in a stun allows you to burst them down easily with Flamestrike and Living Bomb. 

Phoenix (R) - Kael'Thas can launch a Phoenix at a target area, causing the flaming bird to deal damage to enemies along its flight path but also when it lands. Its attack radius is large and because of that, it's great for area denial or continued pressure during a group fight over an objective. Placed on an objective or in a location where you're fighting, the Phoenix will zone out enemies players or deal serious damage to those who stay in its radius. 

Pyroblast (R) - allows Kael'thas to send a flaming projectile to a single target. The slow moving spell deals huge damage and on impact will also cause splash damage to those nearby. Pyroblast can no longer be body blocked, meaning anyone who is it is cast on is gaurenteed to die at low health or at the very least, they'll have to use every escape skill (or an invulnerability) to survive. Against high value heroes such as Li Ming or Lt. Morales, it can be very valuable. 


Level 1: Convection

Convection allows Flamestrike to deal much higher damage, as it increases its damage by 5 up to 100 for each hero you hit. Once you reach the cap (20 heroes) you gain an additional 100 bonus damage and its increase becomes permanent. Until you reach the cap and because the bonus is lost on death - play safe. Once you've snagged the 20 players you can relax. 

Variable: Kael'thas is mana hungry and Mana Addict not only improves this for him (quite considerably) but also allows him to obtain Arcane Barrier once he has collected 25 Regeneration Globes. It's a high amount to achieve, but if you're laning (or moving between lanes) and specifically targetting the Regeneration minion, can be obtained fairly quickly. Be sure to collect them as soon as possible. 

Level 4: Mana Tap

Kael'thas is often mana hungry, so taking Mana Tap and having the ability to restore nearly 4% mana every time you use your Trait is often enough to allow you to stay casting in a fight that is lasting a long time. It's great sustain.

Variable: After Gathering Power was nerfed, Netherwind is still the go-to talent for Kael'Thas. Extended reach and quicker speed on Gravity Lapse allows you to easily hunt down those who're escaping or to poke from a safer distance. The fact it also refunds mana when you hit a target alleviates any early game mana issues - just be sure to land it. 

Level 7: Burned Flesh 

Burned Flesh is a great talent if you're on a map that's particularly small or has lots of tight areas to fight over (such as Shrines). Dealing 8% maximum health as damage to two or more enemies is an enormous amount and considering the width you can increase Flamestrike to, it's incredibly easy to gain the benefits from it. 

Level 10: Phoenix

Providing amazing area denial with a relatively low cooldown, Phoenix is amazing for zoning out the enemy players and still dealing damage in the process. Any enemies who fight in it will quickly die, while it also buys your team time on an Objective. 

Variable: Although Phoenix has great area denial, Pyroblast is a good alternative against some compositions. The fact you can target an enemy and instantly zone them out of a fight is powerful, but considering the skill can't be body-blocked gaurentees its damage. Just be aware that if the enemy team has Uther or Kharazim, they'll be able to mitigate the damage. If you can, always aim it on Lt. Morales, Li Ming or any high value target. 

Level 13: Pyromaniac

For every tick of Living Bomb, Pyromaniac reduces your ability cooldowns by 1 second. Considering you can have Living Bomb ticking away on multiple enemies (especially if you use Verdant Spheres for a free cast) you can quickly shave off the cooldown timer for Flamestrike and Gravity Lapse. 

Level 16: Fury of the Sunwell

Fury of the Sunwell allows Flamestrike to explode in the same area twice, 1.5 seconds later. Not only does this effectively double your damage (especially if someone is stupid enough to stand in both) but it also adds further zoning potential to Kael'thas' kit. What still amazes me is the sheer number of players who stand in the secondary detonation. 

Level 20: Flamethrower

Allowing you to cast Flamestrike from a 40% increased range, Flamethrower also allows you to reduce Flamestrike's cooldown by 4 seconds for every 2 heroes you hit. Combined with Pyromaniac, you can cast Flamestrike far more often. 


These Hero Threat Levels (1 being lowest threat and 10 being highest threat) are to help you determine which enemy Heroes can give you a headache. Any Heroes that aren't on this list are easy pickings for Kael'Thas. If a Hero is listed here, take greater care and unsurprisingly, most of Kael'Thas' threats are the same as Jaina's. 



Illidan: His mobility and evades make him a challenge for Kael'Thas. His damage and if he uses an elite will also leave you in trouble. If you miss your Gravity Lapse, it's as good as over. 


Kerrigan: Staying out of her range is important because if she catches you with Primal Grasp > Impaling Blades you're going to take a huge amount of damage. 


Murky: Sounds silly, but his Slime combined with his survivability make him a nightmare to deal with, especially if he Bubbles correctly. 


Nova: Nova loves to kill Kael'Thas.  If you are not full health and you are alone, you are in jeopardy.  Try to always stay near allies and keep your Gravity Lapse ready. 


The Butcher: His charge, Lamb to the Slaughter or self heal can rip you up in seconds. Even if you Gravity Lapse him, a good Butcher will have saved his Lamb to the Slaughter to ensure he can finish you off. Keep your distance!


Thrall: If he gets the drop on you with his root, you're going to take huge damage. Fortunately even if you are rooted, you can then Gravity Lapse him. Just be sure not to miss and if low, remember his Chain Lightning has good range. 


Valla: Her escape makes her tough to kill and her sustain damage can cause real problems, especially with the extended reach of Hunger Arrow. Fortunately she's squishy so if she gets caught in your Gravity Lapse, make it count and burst her down. 


Zeratul: He is much like Nova, only he kills you quicker. Be nervous if he's in the enemy team. 


Varian: If he takes Colossus Smash, his stun plus his Heroic can melt you near instantly.  8/10
Valeera: Similarly to Nova and Zeratul, her stun/silence and pure burst make for a miserable time against her. 10/10
Genji: His mobility, Deflect and ability to leap into the backline make life pretty miserable. 9/10


This list of tips and tricks are just a handful of things we think will help your Kael'Thas play and based on his playstyle, he shares many of the same tips as Jaina. We'll continue to add to the list as required and if you have any tips you'd like to share, let us know in the comments below and we'll place them here. 

1. Positioning is so important that I can't stress it enough. Stay out of the fray and be artillery. 

2. Your Heroic can turn a fight. Use it to prevent an objective being taken or to stop the enemy players marching into your base when your Towers are out of ammo. 

3. Don't roam alone unless you have to.  There are many Heroes who can make your life miserable.  

4. Always try to hit enemies with Gravity Lapse if they get too close. It's your only escape skill so don't miss it. 

5. Living Bomb should be used as often as possible during early game as it's a free poke when used with Verdant Spheres. 

6. Remember your damage spike: Verdant Spheres > Gravity Lapse > Flame Strike > Living Bomb 

7. Use Flame Strike to clear minion waves but be conscious that it'll quickly eat up your mana if you do it too often. 

8. During early levels, it's a good idea to roam from Top to Mid or Bottom to Mid. You'll usually be able to snag a few kills with a quick rotation of your abilities. Just pre-warn your team. 

9. Try to ensure that you use Flamestrike in a location where you think players will move to, rather than where they currently are. It takes time to practice, but you're much more likely to hit someone this way. For example, when they're running back to base aim at their gates rather than their feet.

10. Always aim for squishy targets (Valla, Jaina, Sgt Hammer) who will quickly die and spread Living Bomb to others. 

11. Think carefully about drafting Kael'thas if the enemy team has stealthed Heroes. You can die near instantly. 

12. It's worth saving Phoenix for moments when you know a team fight will occur. You need to maximize its duration and zoning potential. 

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Last Updated: Jun 24, 2017

About The Author

Burnell 1
Lover of all things MOBA, Lewis splits his time between Heroes of the Storm, Battlerite and Gigantic.