Royal Caterpile

The Royal Caterpile is an enemy in Xenoblade Chronicles that is a member of the Caterpile family. They can be found at level 74 in the Windy Cave on Bionis' Leg. They are the strongest Caterpile in the game and the only enemy able to drop Caterpile Silk which is needed for the reconstruction of Colony 6 and the "Replica Monado 1" quest.

Chests Rates

 * Wood = 63.7%
 * Silver = 34.3%
 * Gold = 2%

Wood

 * Materials
 * Quality Insect Jaw - 67.7%
 * Caterpile Silk - 32.3%

Silver

 * Crystals
 * Physical Protect IV / Aggro Up IV - 25%
 * Physical Protect IV / HP Steal IV - 25%
 * Weapons
 * Empire Pike - 5.7%
 * Meteor Nibbler - 4.2%
 * Forma Spear - 3.8%
 * Titan Guarder - 3%
 * Armors
 * Rondine Top - 11.5%
 * Rafaga Armour - 9.6%
 * Z Speed Goggles - 6.5%
 * Hierax Cap - 5.8%

Gold

 * Weapons
 * Empire Pike - 11.3%
 * Forma Spear - 1.7%
 * Meteor Nibbler - 1.4%
 * Regal Daggers - 1%
 * Unique Weapons
 * Safe Driver - 11.3%
 * Calming Spear - 1.7%
 * Calming Biter - 1.4%
 * Chaos Break - 1%
 * Unique Armors
 * Asura Plate - 11.5%
 * Asura Helm - 10.9%
 * Eclipse Gear - 9.6%
 * Eclipse Armour - 6.5%
 * Advanced Books
 * Tantrum - 14%
 * Thunder - 9.4%
 * Wild Down - 5%
 * War Swing - 2.3%