"My blades are thirsty!"
Oni is a hero in Kingdom Rush. He is unlocked by paying $4,99 as an in-app purchase (on mobile) or by finishing The Dark Tower (on Steam). He is not available in the Flash version.


Relentless warrior, in search of vengeance, his name inspires fear among the demon armies he faces. Armed with his dark honor and blazing katanas!

Physically, Oni is a very tall warrior, standing to the height of a Dark Slayer and possessing nearly equal power. He is burgundy red, with bright red flames surrounding his two katanas. Oni is actually very fast and can move from enemy to enemy quickly, leaving a trail of dead bodies in his wake.


Oni Stats


Level HP Melee Damage Armor Respawn
1 425 14-41 Low (30%) 18s
2 450 15-45 Low (30%) 18s
3 475 16-49 Low (30%) 18s
4 500 18-53 Medium (40%) 18s
5 525 19-56 Medium (40%) 18s
6 550 20-60 Medium (40%) 18s
7 575 21-64 Medium (50%) 18s
8 600 23-68 Medium (50%) 18s
9 625 24-71 Medium (50%) 18s
10 650 25-71 Medium (60%) 18s


OniSwordTormentSword Torment

Oni stabs his swords into the ground, using ancient magic to summon the swords wielded by warriors who died in the area long ago, to rise and stab enemies from beneath.

Ability Level Hero Level Damage Radius
1 2 25-150 Medium
2 5 75-200 Medium
3 8 100-250 Medium

DeathstrikeDeath Strike

Oni raises his sword above his head, channelling the ancient power of the Gods to smite a single foe with incredible power. (Cooldown: 12 seconds)
Ability Level Hero Level Damage Instant kill
1 4 150-300 15%
2 7 200-400 20%
3 10 250-500 25%


Oni is a pure melee hero capable of annihilating any foe. Oni is specialized at 1 on 1.

Defensively, Oni has a lot of health, and is protected by good armor. He can stand for a while against most foes, even huge ones like Yeti and Forest Troll. Like all Kingdom Rush heroes, Oni recovers 25% of his max health each second while idle (when neither moving nor engaging). For example, Oni heals 144 health/s at level 7, 150 health/s at level 8, 156 health/s at level 9, and 163 health/s at level 10. So, it takes 4 seconds to fully heal. Oni needs a relatively short period of idle time to start healing, some heroes such as Hacksaw need more time although the differences among them are slight.

  • Bosses who cannot instant-kill, such as Ulguk-Hai or Gul'Thak, will take a while to kill Oni, so you can safely tank him against them, and retreat when he is heavily injured, then go back into the fray after he has healed himself.
  • Ranged attackers can be distracted by using Oni as a meat shield, protecting soldiers who would otherwise be overwhelmed. Be careful though, groups of strong ranged foes like Troll Chieftains and Flareons can still kill Oni quickly.
  • Since Oni is immune to demons' infernal combustion, (their death explosions), he is one of the few heroes capable of fighting demons for an extended period of time without losing a lot of health.
  • Offensively, Oni, with his skills, deals the most damage of all the heroes. His Death Strike allows Oni to kill even the toughest of foes within a matter of seconds, while Sword Torment will dish out immense damage to all enemies around him, or enough to greatly weaken most. Both skills deal True Damage, thus you do not need to worry about armor/magic resistance.
  • When Oni has acquired Death Strike, even bosses take significant damage from the skill, and while not enough to kill them, it will still provide a great help to weaken the boss. 
  • To avoid Oni wasting his powerful skills on weak, lone foes, you should always send him into the spot with the highest enemy concentration and try to get him into combat with the strongest foe. Doing so will make the most of Oni's great melee capability, and quickly getting rid of that huge enemy to ease the pressure on your defense. Overall, try not to leave Oni unattended, as he can move fast and can be more helpful if he spreads out his usefulness across the battlefield.
  • Against bosses who can instant-kill units, such as J.T., Sarelgaz, do not send Oni against them. No matter how durable he is, versus an instant-kill, Oni will be dead in one second, doing little to hurt the boss while troubling you with his longer than normal respawn time.
  • As a pure melee hero, Oni can do nothing to harm flying enemies. Use your towers to kill off the fliers while he deals with ground foes.
  • Like Death Ray, Death Strike's instant-kill removes the death explosions of Abominations, prevents Fallen Knight from turning into Spectral Knight, and kills Lycan in human form without them shifting to werewolves.
  • Because Oni raises his swords slowly for Death Strike, it can be wasted on an already dead enemy. Then, you can avoid it simply by repositioning him right away.

Related Upgrades

  • KR Up Spiked Spiked Armor (3 Stars): When attacked, soldier's spiked armor return a percent of the damage received to the attacker. Spiked Armor also affects Reinforcements and Heroes. (~12.5% reflection of damage, dealt as True Damage)


  • Off with their heads!
  • Banzai!
  • My blades are thirsty!
  • A good death!
  • (when killed) Death brings me honor...


  • An Oni (Kanji: 鬼) is a yōkai (spirit or demon) from Japanese folklore. They are usually ugly looking with wide grins, horns, fangs and usually red or blue skin. While usually malicious monsters that attack people, they can also be considered protective, as statues bearing their grimacing faces are found on buildings to ward off other spirits (like gargoyles found on European buildings for the same purpose). The Oni feature a great deal in Japanese culture, appearing in some form in numerous Manga, Anime and computer games.
  • "Off with their heads" - Said in several different forms, but popularly linked to the Queen of Hearts in Alice in Wonderland.
  • "Banzai!" - The Banzai charge is the term used by the Allied forces to refer to Japanese human wave attacks mounted by infantry units. This term came from the Japanese cry "Tenno Heika Banzai" (天皇陛下萬歲, "Long live the Emperor"), shortened to banzai, and it specifically refers to a tactic used by Japanese soldiers during the Pacific War.
  • "My blades are thirsty"
    • The a line of a song called 'Swordmaster' by Battlelore.
  • "A good death"
    • A line spoken by Kasumoto in the film The Last Samurai.
  • "Death brings me honor"
    • When killed, Oni draws his wakizashi (which is not used in combat) and performs seppuku, the ritual suicide that samurai perform so they can die with honor.


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