- Researches upgrades to the Harlequin force for new abilities and equipment. - Infantry health and armour researches make your troops more durable. - Sow fear and confusion amongst your enemies using unique harlequin abilities. - Increase the potency of your infantry units with advanced equipment upgrades. - Enjoys a mild regeneration effect, a gift from the Laughing God. - Allows The Dance Without End army Tier upgrade, from the Pavilion of Tears.