An example of a Night Quest.
Night Quests
From the Hypixel Pit Wiki

Night Quests are special tasks in the Hypixel Pit. They occur every 36 minutes at nightfall while the user has the Heresy renown upgrade, unlocked at prestige VI.

When a night quest occurs, a chat message appears with the task to complete. The list of possible tasks is as follows:

Upon completion, night quests add one Chunk of Vile to the player's inventory and grant 200 XP plus an additional 25 XP per prestige the player has.