Royal Mastogob's Greenhouse Key

 is a key.

Obtaining

 * Crafted by a Handyman (Lv. 100) from
 * 2 Aspen
 * 2 Mastogob Wool
 * 2 Mastogob Warrior Horn
 * 2 Venerable Mastogob Wool
 * 1 Woolly Bow Meow Hair
 * 2 Mastogobbly ear
 * 2 Obsidian
 * 1 Gullipop Feather

Uses

 * Access
 * The Mastogob Dungeon