Crimson Fugue

How does the kill bonus work?

Each enemy destroyed grants a turret damage bonus for 8 seconds, up to five stacks. The bonus is +2.5% per kill at rank 0, +15% per kill at rank 5, and +27.5% per kill at rank 10. The listed effect is a per-stack bonus; five stacks require five qualifying kills while maintaining the timed stacks.

When should you consider it?

It suits Railjack engagements where your turret use and kill pace let you build and refresh stacks. It is a standard Plexus mod with Madurai polarity and base drain 10. If kills are intermittent, the 8-second duration can make it harder to keep the stacking bonus active; the listed effect does not grant a permanent damage increase.

Which alternatives serve different goals?

Defensive Fire instead adds maximum shields per enemy killed, with a 10-second duration and up to 10 stacks, so it supports shields rather than turret damage. Waveband Disruptor adds a chance for turret critical hits to ignore enemy shields. Granum's Nemesis is a direct turret damage multiplier against Corpus. These are different effects; consider the one that matches the encounter need rather than treating them as interchangeable damage upgrades.

How much to fuse?

The mod has 10 ranks. Its listed bonus reaches +15% per kill at rank 5 and +27.5% at rank 10. The final step from rank 9 to 10 costs 15,360 Endo and 741,888 Credits, so weigh the larger per-stack bonus against that steep final-rank cost. The provided acquisition list names several Railjack enemy types and a Cannon Battery; their listed chances are snapshot values, not a promise of current availability.

Limitations and tradeoffs

• The damage bonus depends on kills and expires after 8 seconds per stack.
• The final rank has a substantial listed Endo and Credits cost.