Changes

{{rename|Level 4 ATK and DEF conventions}}

The ATK and DEF of a Level 4 or lower [[Monster Card|monster]] tend to be limited by two unwritten rules: the '''"2000 ATK Rule"''' and the''' "2300 DEF Rule"'''. These rules state that for a Level 4 monster to have an [[ATK]] or [[DEF]] equal to or higher than these values, it must have some kind of [[negative effect]] or other restriction (such as being a [[Nomi]] monster). For example, "[[Meklord Emperor Wisel]]" is a Level 1 Monster Card that has 2500 ATK and DEF; however, it cannot be Normal Summoned or Set.

==Rule of 2000 ATK==

The "Rule of 2000 ATK" states that if a monster has 2000 or more ATK, it must have some [[negative effect]] or other restriction to limit its playability. For example, "[[Thunder King Rai-Oh]]" has 1900 ATK and is thus permitted to have a beneficial [[card effect]], but "[[Panther Warrior]]" and "[[Zombyra the Dark]]" have 2000 and 2100 ATK respectively, and thus have the negative effects of requiring a [[Tribute]] in order to attack and losing ATK upon attacking, respectively.

==Rule of 2300 DEF==

The "Rule of 2300 DEF" states that if a monster has 2300 or more DEF, it must have some [[negative effect]] or other restriction. For example, "[[Gladiator Beast Hoplomus]]" and "[[Gear Golem the Moving Fortress]]" have 2100 and 2200 DEF respectively, and are allowed to have positive effects, while "[[Big Shield Gardna]]" has 2600 DEF and has the negative effect of being forced to switch to its weak [[Attack Position]] after being attacked.