Defy XT Case, Empire Full Coverage Tortoise Shell Case for Motorola DEFY XT XT556 Specially designed Full Coverage Tortoise Shell Case for Motorola DEFY XT XT556. Custom tortoise shell pattern with a glossy finish. Precisely engineered two-piece snap-on design ensures outstanding protection for your Motorola DEFY XT XT556. Made of the highest quality mould material for maximum protection and durability. EMPIRE is a registered trademark with the USPTO.