Blights have a small chance to drop a Blighted version of a map. Blighted maps only contain a small area with no enemies and a single Fungal Growth that spawns dozens of roots. The player must defend the pump for 5 minutes, then defeat all remaining enemies. Players get extended prep time and pump durability increased to 20.
These maps can also be annointed, adding a variety of unique modifiers, including extra experience and significant boosts to rewards.
If you fail the blight encounter, it will not count as a map completion.