Mark I is an unlockable familiar in Lost and Forgotten, a mod for The Binding of Isaac.

Grants a Mark I familiar that follows Isaac.

After entering a new room Mark I creates large laser rings for each enemy.

Laser rings follow enemies and quickly shrink.

Defeat Isaac as Robot.

Mark I can be found in the following item pools:

The following tags are applied to this item:

The following special synergies and interactions for Mark I have been documented.

* Note that not all possible synergies and interactions are listed here.

• Download Lost and Forgotten from the Steam Workshop.