Allows admins to use invincible steel blocks for public horde bases. The blocks do take damage, but the downgrade path ensures that it never actually disappears. When one is destroyed, it is replaced by a copy of itself. As a bonus to players, it also provides a steel upgrade path for iron bars.
This mod works on servers with no client side installation necessary, or on single player games.
The forum topic of the mod is here.
Credits: Dhlmaster
