Wall of Heads

The  is a fort object introduced in the 13.0.0 update.

Appearance
It appears to be a wall of 3x3 green zombie heads, all looking similar to each other: their heads are all green, they all have red eyes and they all have their mouths open wide.

Use
It prevents players from passing through and causes damage when touched.

Trivia

 * This fort object is currently uncategorized. It can only be found in the Storage, but it cannot be found in the defense, assault or decoration categories.
 * There are 9 heads.