Koschevoi is a Season 4 Bomber. Use Koschevoi when you attack alone: the War skill Surveillance Probe gives all troops +16% DEF at Lv.5.
Exclusive skills: Arrest Magnetic Vortex, War Surveillance Probe.
Where this comes from: Koschevoi’s hero and Exclusive Equipment screens, captured by MORÖX on S216 (Sep–Oct 2026).
Also from the game: all 6 hero skills (3 Arrest, 3 War) with Lv.1 to Lv.5 values, from Koschevoi’s Skills screens (Oct 2026). Jump to skills.
Not yet measured: star upgrades.
What would change this: a game update to Magnetar or to Koschevoi’s skills.
When to use Koschevoi
Koschevoi’s War skill switches on only when you attack alone. In any other battle it does nothing, so a trio built for a different battle leaves Koschevoi idle. Read the pick-by-battle table to see who else boosts solo attack battles.
As a joiner, Koschevoi brings only the 1st War skill: Precision Strike (Increases DMG for all our troops by 25%). That counts in Cage. MIRÖX’s call: join a rally with Koschevoi, S-tier.
Source: in-game skill screen. Read the Cage guide.
Exclusive Equipment: Magnetar
Bomber HP and Lethality +97% at Lv.10.
Season 4 equipment adds +9.7% troop HP and Lethality per level, up to +97% at Lv.10 (499,500 power). Maxing it takes 550 parts. In most heroes the rate is set by season, not by the hero: see the Season Rule. Known exceptions: Tyronn and Phoenix.
Odd levels raise the Arrest skill, even levels the War skill
Exclusive skills
Magnetic Vortex
Enhances Reverse Wave, increasing DMG dealt by 120% and decreasing the enemy DEF by 12.5%.
Arrest skills change how Koschevoi fights.
Surveillance Probe
Solo attack: all troops DEF +16%.
War skills boost every troop, in one kind of battle.
Max star bonus: Magic Artillery
When not deployed, he can provide fire support, increasing all our Troops ATK by 15%.
This works while Koschevoi is not in the march. At max stars, Koschevoi helps from the bench: build your trio with other heroes and still get +15% ATK.
From the in-game max-star tooltip. How it works with several marches: under testing.
Trios with Koschevoi
Full Solo-role trio. Edwin is the centerpiece and becomes more dangerous when outnumbered.
Role-aligned Solo setup before Edwin. Veronica adds a chance-based damage-taken interaction.
Hero Combo Academy trios, now in the Trio Lab guide. Every hero in these trios has an in-game War skill for that battle (54 of 54).
Hero skills
Koschevoi has six hero skills, levelled from 1 to 5. Arrest skills work in Koschevoi’s own fights. War skills boost your troops in the battles Koschevoi marches in. In a rally, a joiner brings only the first War skill of the first hero: for Koschevoi that is Precision Strike.
Missile Combo
Fires 3 consecutive rounds of missiles. Each round randomly targets enemy units (prioritizing Heroes) and explodes at the enemy's location, dealing AoE DMG equal to ATK*120%.
Reverse Wave
The device emits a large circular electromagnetic wave centered on itself, increasing ATK Speed by 26% for allied units, decreasing ATK Speed by 20% for enemy units, and dealing DMG equal to ATK*240% to enemy units.
Incoming Missile
After every 4 basic attacks, launch 2 tracking missiles at the attack target, each dealing AoE DMG equal to ATK*180%.
Precision Strike
Increases DMG for all our troops by 25%.
Cannon Barrage
Bombers deal an extra 50% tactical DMG each round.
Artillery Support
Increases Bombers' ATK by 30%, DEF by 15%.
Skill text copied from Koschevoi’s in-game Skills screens, shared by MORÖX (Oct 2026). Every value passed our skill checks. Tags such as “Weakens enemy” are our summary of the game text.
Warden notes
Tips, questions and field reports from members about Koschevoi. A member’s first note is read by the LOJ XLab team before it shows.
Members only · be specific (season, battle, levels) · no names of other players · max 1,000 characters.
More Season 4 heroes
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ZoltanShieldbearer · DefendingAll heroes →HEROpediaGame data © Singapore Just Game Technology. LOJ XLab is not affiliated with the publisher. HEROpedia started as MIRÖX’s Discord series. Study smart. Deploy smarter.