Critical Hit

> Game Rules

A critical hit is like a standard hit, with a bonus on the result of the action. The probability of landing a critical hit depends on the entity's Agility and is given by the formula:

Critical hit probability = Caster's agility / 1000

Examples:

0 agility or less => 0% chance of a critical hit
100 agility => 10% chance
500 agility => 50%
1,000 agility or more => 100%

The bonus for a critical hit is 30%, i.e. 1.3 × the base effect (in your code, you can use the CRITICAL_FACTOR constant, so your AI isn't affected if an update ever changes this ratio).

All effects can crit, but for some of them it makes no difference: for example, teleport, antidote, push, attract, invert, remove_shackle... give the same result on a critical hit as on a normal hit.

If you summon with a critical hit, all of the summon's characteristics are boosted by 20%.

For items with several effects, the bonus applies to all effects.

For damage dealt by a critical hit, the erosion rate is increased by 10%.

For a critical POISON effect, the erosion rate goes from 10% to 20% of the damage dealt.
For all other critical effects, the erosion rate therefore goes from 5% to 15% of the damage dealt.