Back Atk Plus

For the augment in Xenoblade Chronicles X, see Back Attack Plus.

Back Atk Plus
[Passive] Increases back attack damage dealt by (value)%.
Element	Electric
Category	Attack
Equips on	Weapons
Max Combined	100%
Sell Price	2000 G (Rank I)

Back Atk Plus (Japanese: 背面攻撃強化, Haimen Kōgeki Kyōka) is a Gem in Xenoblade Chronicles that increases damage when attacking enemies from behind.

Gem stats

	Damage Increase
Rank I	5-10%
Rank II	15-20%
Rank III	25-30%
Rank IV	35-40%
Rank V	45-50%
Rank VI	75-100%

Gem sources

Ways to obtain Back Atk Plus gems, including completing Quests, trading with NPCs, and completing categories in the Collectopaedia.

Rank I	None
Rank II	Collectopaedia Ether Mine - Animal category complete
Rank III	None
Rank IV	None
Rank V	Trade Oleksiy (Satorl Marsh, 1*) (Only while the quest Stopping the Elopement (Zel Argentis) is active.) Treasure Chest Behind a High Entia Door on the Kromar Coast at Eryth Sea. Requires the High Entia Emblem to access.
Rank VI	None

Crystal and cylinder sources

Places to mine for Back Atk Plus crystals, and enemies which drop Back Atk Plus Crystals and Cylinders.

Rank I Rank I	None
Rank II Rank II	Enemies Glorious Buer Poleaxe Chilkin Fork Chilkin
Rank III Rank III	Enemies Vague Barbas Reef Nebula
Rank IV Rank IV	None
Rank V Rank V	Enemies Veteran Yozel Clamorous Dablon Green Feris

Unique armour and weapons

Unique Armour and Weapons with Back Atk Plus gems permanently attached to them.

Rank I	None
Rank II	Weapons Pandemonium Queen Frog
Rank III	Weapons Fish Biter Silver Vasanova
Rank IV	None
Rank V	Weapon Chosen One
Rank VI	None