As the enemy draws near, mobs of Night Goblins unleash Fanatics in a whirlwind of destruction.
Fanatics are not placed on the battlefield at the start of the game. Instead, make a note of which Night Goblin units include Fanatics, and of how many they include. These units are referred to as ‘concealing’ units. A concealing unit may release one or more of its Fanatics during any Start of Turn sub-phase.
When a Fanatic is released, it travels through the air to land spinning several feet away from its concealing unit, before embarking upon its erratic journey across the battlefield.
To represent this, place the model so that its base is within 3" of its concealing unit and not touching the bases of any other models.