If you have a creature equipped with a , and I cast a lethal on it, you won’t gain any life. While the damage is dealt first, the creature doesn’t actually get destroyed until the spell finishes resolving – when State Based Actions are checked. By this time, the is no longer around.
Category: State-Based Actions
Protection from Artifacts makes Equipment Fall Off
Giving a creature protection from artifacts will cause any equipment attached to it to fall off. So with , be careful with your own equipment, but remember you can use it AGAINST your opponents equipped creatures as well!