Attack Plus

Attack Plus is a gem effect in Xenoblade Chronicles. It increases the maximum damage stat of a weapon, up to 999.

Overview
Attack Plus widens the range of a weapon's possible damage, making it deal more damage overall, but inconsistently. In the original version, due to the damage range glitch (damage can only reach minimum+99), this has no effect if the weapon already has a wide range; gems must be used to raise the minimum before raising the maximum does anything, making Attack Plus the significantly less useful of the two. This is fixed in the Definitive Edition, making both gems equally effective until the maximum is capped.