Kullervo (Boss)

For the Warframe, see Kullervo.

Kullervo is a Field Boss that may sometimes be marked as a stage objective in Duviri's The Duviri Experience and The Lone Story at the second half of Anger, Sorrow or Fear Spiral stages. Regardless of the primary objective however, Kullervo may be fought at Kullervo's Hold as a side objective in The Duviri Experience anytime. Players can speak to The Warden at the highest point of Kullervo's Hold to engage in combat with the imprisoned Warframe.

Upon besting Kullervo, the players will still have to defeat the Orowyrm of the current Duviri session to be eligible for his  Kullervo's Bane drop, requiring the player to fully finish the Spiral.

Behavior

Kullervo's battle consists of three phases, each phase adding a new power to his arsenal. Three randomly chosen "crimes" will open, but the behavior of each phase is always the same.

Kullervo is a largely melee-focused opponent. The Drifter will need to slip between Kullervo's swings to score hits of their own. Kullervo can be staggered with heavy attacks or focused attacks, and is susceptible to status effects

Phase 1

In his first phase, Kullervo will mostly attack with his heavy blade, trying to strike the player with overhead or backhand swings. If his target is too far away, Kullervo may teleport to close the distance. Keep an eye on Kullervo's hands as they may glow in the same manner as a Thrax Centurion, denoting an unblockable strike. If more than one player is present, Kullervo can tag them with Collective Curse, causing damage taken by one player to be shared with another. Kullervo can also throw out his Storm of Ukko, turning a large chunk of the arena into a damaging field of raining knives; this attack can be interrupted by a shot from the Sirocco, but the timing is tight.

Phase 2

During his second phase, Kullervo can summon five spectral copies of himself. These copies float in the air and throw large blades at random which explode a short time after landing, staggering any players caught in the blast.

Phase 3

At the start of his third phase Kullervo will be accompanied by some number of Persecutor Liminus. If the Liminus are all killed, a cutscene plays where they turn on Kullervo, stabbing him with his own daggers. This causes Kullervo to float in the air and unleash a barrage of lasers. Grounded players will need to step carefully as Kullervo can lead his shots, though players can also escape by hopping on their Kaithe and waiting out the attack in midair.

Notes

• Sometimes The Warden may not initially appear. If this happens, leaving Kullervo's Hold and coming back may cause The Warden to spawn.

Tips

• Unlocking Drifter Intrinsics Combat Rank 3 "Transference Sync" and bringing in a heavily modded Warframe and their weapons completely trivializes the fight, even on The Steel Path.
  • Persecutor Liminus enemies are susceptible to Warframe crowd control abilities.  Confusion will also cause Kullervo to attack them.

Patch History

Hotfix 35.5.3 (2024-04-04)

• Fixed loss of function upon Confronting Kullervo if the player spoke to the Warden in Duviri while mid-teleport to a Materlith.

Update 35.5 (2024-03-27)

• Fixed being able to interact with the Seven Crimes bulletins in Kullervo’s Hold during the fight with Kullervo.
  • To avoid distracting from the fight or accidentally interacting with them and putting players in a vulnerable position from standing still. Players can still interact with these before or after the fight!
• Fixed the pause menu getting dragged on top of the camera view of Kullervo’s cell after interacting with one of the bulletins in Kullervo’s Hold.
• Fixed Kullervo and a couple of the items in his cell in Kullervo’s Hold slightly floating above the ground.

Hotfix 33.5.2 (2023-06-21)

Kullervo Fight Changes:

The difficulty of the Kullervo fight has been adjusted to be more manageable for the Drifter Melee combatants. This was done in two ways: by adjusting some of his mechanics, and tweaking the amount of damage he receives from certain sources.

Changes to Kullervo’s mechanics:

• Decreased the frequency of ability casts and increased telegraph times slightly for several abilities so that they are easier to avoid.
• Increased the duration of the window of opportunity after ability casts in Phase 3.
• Reduced the frequency of unparryable heavy attacks.
• Increased the usage of melee attacks, but reduced the attack speed slightly to encourage more melee engagement.
• Decreased melee attack damage slightly, and normalized some melee attack damage values.
• Slightly decreased Kullervo's health.

Changes to Kullervo’s damage receival:

In changing his mechanics, we have also made these alterations to how he receives damage, to encourage player melee engagement overall.

• Significantly increased damage taken from parry finishers.
• Reduced the damage taken from Rifles and Shotguns (Transference Surge).

Changes:

• Updated the time-limited Kullervo’s Hold on-hover description to clarify that the fight is also accessible in The Lone Story and The Duviri Experience.
  • “Complete a Lone Story with an opportunity to confront Kullervo. Kullervo can also appear during The Duviri Experience and The Lone Story any time Duviri is in a Fear, Anger, or Sorrow Spiral.”
• Added timer before teleporting far away players to Kullervo’s Hold for the fight.
• Side objective Undercroft Portals are now deactivated while the Kullervo fight is active.
  • This is to prevent potential issues from occurring.

Fixes:

• Fixed the incorrect range of Kullervo’s Bane being rewarded for completing The Steel Path Kullervo’s Hold fight.
  • Prior to this fix, it was possible to receive 4 or 5 Kullervo’s Bane on The Steel Path, which is under the intended range of 6 to 8. This has now been restored!
• Fixed being unable to matchmake for Kullervo’s Hold time-limited node if players in the squad had already loaded into Teshin’s Cave.
• Fixed getting a Common Decree instead of Rare for completing the Kullervo Fight in Duviri.

Hotfix 33.5.1 (2023-06-21)

• Fixed public matchmaking not working for the time-limited Kullervo’s Hold node.
  • The team is aware of lingering Matchmaking issues if the player has already loaded in the Cave
• Fixed becoming invisible when mounting Kaithe while Kullervo boss casts his Collective Curse ability.
• Fixed Persecutor Liminus from the Kullervo boss fight appearing in the Orowyrm cinematics.
• Fixed being unable to link Kullervo’s Bane.
• Fixed a script error caused by Host migration while the Kullervo fight is starting.

Update 33.5 (2023-06-21)

• Introduced.