Arion's Gate

 is a rare base item.

Obtained from

 * Metal Part II: Loot Cache
 * Metal Part II: Large Loot Cache
 * Metal Part II: Large Treasure Box
 * Metal Part II: Small Treasure Box
 * Metal Part II: Treasure Box
 * Metal Part II Base Item Box
 * Metal Part II Large Base Item Box

Feats

 * How Bazaar: Collect 1 Base Item from Metal Part II (10 points)
 * Better Hawks and Guardians: Collect 10 Base Items from Metal Part II (25 points)
 * The Best Nest: Collect 30 Base Items from Metal Part II (50 points)