The quintessential obstacle is a wall a zombie cannot move past a wall without somehow creating a breach or slipping in through an unclosed door. Obstacles are structures that mobs cannot move past without somehow overcoming them.Mobs avoid walking on honey blocks and prevent entities from jumping. Soul sand, slime blocks, honey blocks and slowness potion turrets are also delayers because it reduces the movement speed of anything moving on it, including mobs. A ring of torches is a delayer because it increases the distance mobs must spawn from the structure (and player), thus increasing the time it takes for them to reach the next layer of defense. Delayers slow down the progress of an enemy inwards.Passive defenses generally fall into one or more categories, sorted by their impact on an aggressive force. The following sections discuss various types of passive defenses, their construction, maintenance, and applicability. The most common example is walls - they do not have to sense a mob coming or sense its position to prevent it from entering a walled off area. Passive defenses prevent hostile mobs from entering the protected area without any input or sensory devices. 7.6 Auto-Refilling Arrow Rapidfire Dispenser.

If you have to press 2 buttons and destroy a block to activate it, it is too complicated. A good defense must be safe and easy to use. Ease of use - The best defense in the world is useless, if it kills the owner or friends.walls) or by renewing themselves automatically Sustainability - Defenses should work regardless of player input and, ideally can protect an area indefinitely, either by never degrading in the first place (e.g.Light - A regular system of lighting with torches, fire, or death is needed to prevent hostile mobs from spawning within the protected area.Coverage - All defenses need to completely defend the protected area or defense, so that mobs entering from any side or angle and of any type will not break through.

As such, integral to all Minecraft defense systems: Some of the best defense measures are those that prevent hostile mobs from spawning entirely or at least prevent hostile mobs from ever getting close to the protected area or defense mechanism.

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