Rule of 3000 ATK and DEF

The "Rule of 3000" is a general rule that few monster cards have an Original ATK over 3000. Those that do typically have special conditions for being summoned, often very difficult conditions. A very small number of monsters with over 3000 ATK can be Normal Summoned, but with only one exception (Super Conductor Tyranno), they have negative side effects that can hamper their usefulness.

Because of this, most monsters that have 3000 DEF and are in Defense Position, such as Labyrinth Wall, are usually safe from attacking monsters, unless card effects that change ATK and DEF are used.