Info

Quest items, like this one are used automatically. For example if the quest item gives bonuses to a crafting skill or enchanting, then the skill bonus and xp will be applied upon crafting or enchanting. If its an item, like Flask of Fresh Air for example - then it gets used when you attempt to walk on water for the first time.

Info

Voidance and Devoidance comes in two forms: Devouring Light and Devouring Darkness.

Devouring Light on enemies will give them a chance to void you of your enchantments and artifacts and boons, making you use raw unmodified stats and damage to strike the enemy.

Devouring Light on the player will void the enemy of their enchantment damage and artifacts.

Devouring Darkness will have a chance on either side to void the others Devouring Light.

If the enemy is devoided (Devouring Darkness has fired) they cannot then void you. A Devouring Darkness successful fire will void a Devouring Light chance of ever firing, which then allows your Devouring Light a chance to fire and void the enemy for the battle.

You can read more about how this works in the help section.