Chance to Evade is Unlucky
Chance to Deflect is Lucky

Hits with this weapon roll against their Critical Hit chance twice when determining if they are a Critical Hit.

If either roll succeeds, the hit will be a Critical Hit, and thus the Critical Damage Bonus will apply as normal.

If both rolls succeed, the hit will be a Critical Hit, and the Critical Damage Bonus will apply twice to that Hit.

If a modifier makes your Critical Hit Chance Lucky, that Luck will apply individually to both of these rolls.

Some effects manipulate how random chances are rolled in ways that affect the result without changing the stated chance for the effect, such as a chance being Lucky causing it to be rolled twice and use the better result, or an effect skipping the roll entirely to force something to succeed or fail. The Effective chance is the real chance to get a specific result, accounting for all such roll-manipulating effects.

For example, if you had a Critical Hit chance of 20%, and your Critical Hit chance was Lucky, you would have an Effective Critical Hit chance of 36%, which is the chance that at least one of the two 20% rolls succeeds.

This weapon's hits will not roll a random value between the minimum or maximum damage value, but instead will always roll either the minimum value or the maximum value, with a 50% chance for each.

Each Damage Type has its damage value rolled separately, so if the hit deals multiple types of damage, some types may roll the maximum while others are at minimum.

If the damage rolls are Lucky, that will still apply, make this roll twice and picking the maximum if either roll had that result, only picking minimum damage if both rolls selected minimum. Unlucky damage rolls will prefer minimum damage in the same way.