Knock is an unlockable passive item in Benighted Soul, a mod for The Binding of Isaac.

On pickup Spawns V - The Hierophant.

While held 50% chance to spawn V - The Hierophant for hurt every 5 times.

When using V - The Hierophant, tries to open red special rooms, and gain a Broken Heart for every special room opened.

When entering the Ultra Secret Room, removes 5 Broken Heart.

Room types that may appear:
• Shop.
• Treasure Room.
• Secret Room.
• Super Secret Room.
• Arcade Room.
• Curse Room.
• Library.
• Sacrifice Room.
• Devil Room.
• Angel Room.
• Isaac's.
• Barren.
• Chest Room.
• Dice Room.
• Planetarium.

Defeat The Beast on Hard Mode as Benighted Lost.

Knock can be found in the following item pools:

The following tags are applied to this item:

• Download Benighted Soul from the Steam Workshop.