Wicked Sallos

Wicked Sallos is a Unique Monster in Xenoblade Chronicles that is a member of the Pterix family. It can be found at level 95 on the Distant Fingertip of the Fallen Arm but only if it is not raining or if there is no thunderstorm. It can drop a Pterix Energy Egg, which are needed for one path of the "Lifespan of a Machina" quest.

Chests rates

 * Wood = 0%
 * Silver = 0%
 * Gold = 100%

Wood

 * Materials
 * Pterix Energy Egg - 75%
 * Natura Glyph - 25%

Silver

 * Crystals
 * Break V / Arts Heal V - 25%
 * Break V / Aura Heal V - 25%
 * Weapons
 * Darkness Sickle - 5%
 * Satellite Shot - 4.7%
 * Meteor Nibbler - 4.2%
 * Meteor Staff - 2.8%
 * Armors
 * Lancelot Gauntlets - 10%
 * Lancelot Armour - 9.5%
 * Lancelot Leggings - 8.3%
 * Lancelot Boots - 5.6%

Gold

 * Weapons
 * Darkness Sickle - 4.4%
 * Satellite Shot - 4.2%
 * Meteor Nibbler - 3.7%
 * Meteor Staff - 2.5%
 * Unique Weapons
 * Reward Defender - 4.1%
 * Reward Swords - 3.9%
 * Bonus Sniper - 3.4%
 * Reward Nibbler - 2.3%
 * Bonus Staff - 1.2%
 * Unique Armors
 * Eclipse Gauntlets - 10.2%
 * Eclipse Armour - 9.7%
 * Eclipse Leggings - 8.5%
 * Eclipse Boots - 5.7%
 * Eclipse Gear - 3%
 * Advanced Books
 * Shadow Stitch - 15.2%
 * Freezinate - 10.2%
 * Berserker - 5.4%
 * Jaws of Death - 2.5%