Inspect both Raven mutation descriptions before accepting the hero. A useful benefit can be outweighed by a drawback that interferes with that character’s main job.
Read the whole pair
The developer describes mutations as unpredictable variety rather than a min-max guarantee. The current player guide reports a beneficial and a harmful mutation on a new Raven. Compare the actual text against the intended class, resource and weapon.
For example, a cost penalty matters most when it affects the action you expect to use repeatedly. A targeting drawback is especially relevant when the party depends on focusing one dangerous enemy. These are ways to evaluate the description, not claims about exact roll odds.
Review before finalizing
- Create the hero and inspect the character information.
- Read both mutation effects, including conditions and disadvantages.
- Compare them with the class’s expected action and the assigned row.
- Decide whether the party can absorb the drawback.
- If you reject the combination, use the Party Creator’s character options before committing to the campaign.
The player guide describes deleting and recreating the hero during creation. Preserve the other characters you want to keep and use the interface deliberately. This is not an instruction to delete an ongoing save.
After the campaign begins
The public evidence used here does not establish a reliable mutation-change service or a universal later reroll method. Do not spend scarce resources on a rumored reset without checking current official information.
No perfect-roll promise
This page omits a complete mutation table and rare-roll percentages. It has not independently verified the current data file or measured repeated creation outcomes. The goal is to help you notice a bad fit while the choice is still easy to change.
Sources & version notes
Mechanics are reported in the original player guide; developer sources support the broader system. This is not an independent verification of every tooltip or balance value.
- VoidEngineer — original Underkeep Player’s Guide (updated 2026-11-08; checked 2026-11-09)
- Closer to the Depths (2026-05-30)
Compiled from public sources. We have not personally played or tested these procedures. Check your installed build and its tooltips when details differ.