Lightning Attack

Lightning Attack is a gem effect in Xenoblade Chronicles. It adds an additional amount of electric damage to the user's auto-attacks.

Overview
Dealing more auto-attack damage is universally good for tanks, as they would love to have the additional aggro. Non-tanks are a bit less clear on the issue, as they'd rather spend their "aggro budget" on their arts instead. In either case, the additional damage can be further boosted by gems, though this is a bit much investment on someone who can't deal electric damage otherwise.