Breaking the Pact is a quasimorphic artifact for ending a pact and clearing the Banes affecting its user. It is a recovery item, not a routine combat consumable.
Use the artifact for a clean reset
The artifact's listed effect ends any quasimorph Pact held by its user and removes all current Banes. Its weight is 1 and it occupies a single stack, so carrying one is a deliberate insurance choice rather than a free slot.
Use it when ending the pact and clearing the penalties has more value than the benefits the pact still provides. That decision depends on the next operation and the rest of the crew plan.
Know the acquisition paths
The item can appear as mission loot, through barter, or as a reward from selected factions. It can also come from a Malak body part. Those are reasons to recognize it when it appears, not reasons to spend a scarce slot without a recovery plan.
Review the pact state before an important descent. A reset tool has the most value when it prevents a known downside from defining the next run.