Defense

is one of the core player stats. It determines how much reduction the player has. The more a player has, the less damage is taken from attacks. can go 0, but that does not have have any special effect.
Defense does not reduce ; that is reduced by .
==Mechanics==
The more the player has, the less bonus damage reduction the player will have.
The formula for damage reduction is:
\frac{\text{Def}}{\text{Def} + 100}
For example, with , the formula is:
\frac{200}{200+100} = \frac{200}{300}
or ~67% damage reduction, meaning with , the player takes of the damage from monsters that would normally be taken with .
This leads to a misconception that higher is useless because the damage reduction only goes up slightly. This is incorrect, for as the difference from 0% to 50% damage reduction may seem more substantial than the jump from 90% to 95%, both are equal in that they double EHP (100–200 vs. 1000–2000).
===Effective Health===
 (EHP) is the amount of damage enemies need to deal to the player to kill them when is factored in. If one has and , they will be able to take damage before dying, as shown below.
The formula for EHP is:
\text{HP} \times \frac{\text{Def} + 100}{100}
For example, at , the formula is:
100 \times \frac{200 + 100}{100}
or
100 \times \frac{300}{100}
or
100 \times 3
or
The result is , meaning with and , the player can take as much damage without dying as someone who has and could.
EHP is a useful metric for calculating which items are better than others in allowing the player to survive attacks.
EHP does not factor in attacks, which are affected by .
==Increasing Base Defense==
Players do not have any base by default. It can be increased by:
*Leveling 
*The Forbidden Defense upgrade in Wither Essence shop
==Increasing Bonus Defense==
There are several ways to gain additional bonus . They include, but are not limited to:
*Equipping most types of Armor
*Holding certain weapons (e.g. , , , (when Tank in Dungeons), or )
*Using Accessories (ex: Gravity Talisman)
*Using on Armor
*Equipping certain Pets
*Reforging items to certain Reforges (ex: Titanic Reforge)
*Drinking the 
*Abilities such as the 's or the 's 
==Trivia==
*When approaches infinity (i.e. having the maximum defense), the damage reduction approaches 100%.
**However, the 100% is an estimated number, due to how Effective Health is calculated.
**To truly get infinite Effective Health, the only way is to let the naturally regenerated Effective Health outclass the taken.
==History==
zh:防御
Category:Defense
Category:Mechanics
Category:Pages with math equations