Revolutionary Bifrons

Revolutionary Bifrons is a Mechon that is a Unique Monster in Xenoblade Chronicles. It can be found at level 60 in Mechonis Field, northeast of the 4F Main Power Switch. The party must defeat it to complete the Mechonis Field's version of the "Challenge Quest 1" quest.

Chests rates

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

Wood

 * Materials
 * Reinforced Plate - 81%
 * Spathi Glyph - 19%

Silver

 * Cylinders
 * Ether Up IV - 25%
 * Slow IV - 25%
 * Weapons
 * Machina Sniper - 6.9%
 * Machina Rod - 4.6%
 * Machina Cannon - 2.7%
 * Karma Blades - 2.5%
 * Armors
 * Gemini Gear - 10.8%
 * Sleek Glasses - 10.6%
 * F Speed Frame - 6.6%
 * Alcyone Top - 5.3%

Gold

 * Weapons
 * Machina Blade - 6%
 * Machina Driver - 5.7%
 * Machina Nibbler - 5%
 * Machina Rod - 3.4%
 * Unique Weapons
 * Machina Rifle II - 13.3%
 * Machina Nibbler II - 6.7%
 * Unique Armors
 * Agni Plate - 20.9%
 * Lord Leggings - 17.4%
 * Agrius Arms - 11.7%
 * Advanced Books
 * Cure Round - 4.6%
 * Anchor Chain - 3.1%
 * Heal Bullet - 1.6%
 * Power Drain - 0.7%