Delver is a Notorious Monster from Final Fantasy XI: Chains of Promathia. It encountered as part of Promathia Mission 1-3: The Mothercrystals. In addition to its standard Craver abilities, it can also use Impalement, which deals percentage-based damage that lowers its target's health to HP Critical levels. Like all Empty, Delver's elemental weaknesses and resistances vary based on the color of its glowing core.