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How to Beat Lieutenant Lech Kril in Warframe (2026): Shoot the Coolant Pack Four Times
Shoot the glowing coolant pack four times, then he burns and takes any hit
Last Updated on September 30, 2026
The short answer
Kril’s armor blocks everything until you shoot the glowing coolant pack on his back. Each hit makes him freeze himself with his hammer slam, and you punish him then. After four pipes he ignites and takes damage anywhere. Reward: Excalibur parts.
Reviewed September 30, 2026, current through Update 44 (Iceblade of Narin). Every number on this page has two sources; this page is re-checked after every major patch.
| Detail | Answer |
|---|---|
| Node | War, Mars (Assassination) |
| Faction and tileset | Grineer, Grineer Settlement |
| Level | 11-13 |
| Unlock | Complete Augustus on Mars |
| Weak point | Coolant pack on his back, when it glows blue |
| Phase two | Fully vulnerable; heat attacks and a Flame Barrier |
| Signature drop | Excalibur Neuroptics, Chassis or Systems blueprint |
Table of Contents
The two phases
- Keep your distance from the Brokk hammer, and remember he also fires a Gorgon at range.
- Wait until the coolant pack on his back glows neon blue, then shoot it. Shots anywhere else do nothing.
- A pipe comes off and he freezes himself on his overhead hammer slam. Hit him while he is frozen.
- If the pack turns back to red before you shoot it, wait for the next blue window.
- Repeat until all four pipes are gone.
- Phase two: he ignites with heat attacks and can raise a Flame Barrier. He takes damage everywhere now. Finish him.
What it drops
| Drop | Chance |
|---|---|
| Excalibur Neuroptics, Chassis, Systems blueprint (one per run) | 38.72% / 38.72% / 22.56% |
| Cryo Rounds, Stretch, Molten Impact, Killing Blow | 22.92% each |
| Out Of Sight | 8.33% |
| Orokin Cell | 2.58% |
Tips that save runs
- Shoot the coolant pack first. It is the only thing that starts the fight.
- Bring shields or health you can trust for phase two. His attacks are Heat based.
Mistakes that waste runs
- Shooting his armor and wondering why the health bar does not move.
- Missing the blue window and shooting the red pack.