Strength

Strength is an effect which increases attack power.

Effect
Increases melee damage by × level $$. Negative levels decrease melee damage, with attacks being ignored entirely if damage would be 0 or lower.

$$, melee damage under the Strength effect can be found through the equation $$BaseDamage\times1.3^{level}+{1.3^{level}-1\over0.3}$$, where $$BaseDamage$$ is the default damage of whatever weapon or tool is used to attack. Example for an iron sword:
 * Normal:
 * Level 1:
 * Level 2:

Immune mobs
Withers and ender dragons are immune to Strength. While not immune, any mobs that cannot attack are unaffected by Strength.

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