Endless progression
Push Endless Anomalies for tier rewards
Endless progression lets a prepared build test its ceiling while advancing through increasingly difficult tiers.
Endless Anomaly progression accessed through the Anomaly system after unlocking endgame content.
Repeatable tier progression; advancement is limited by your ability to complete increasingly difficult tiers. Rewards vary with progression and are not specified as a fixed guaranteed item.
Stop at the highest tier you can complete reliably, or switch to build improvement when survival and completion pace deteriorate.
Open a guide to find other locations and see what the item is used for.
Endless progression lets a prepared build test its ceiling while advancing through increasingly difficult tiers.