Castle Grimm

Castle Grimm was the home of the Ultragem, a castle of many traps designed to keep the gem safe from the wrong hands. It was also home of the guardian 'Serpentia'. When thief Xenor Krell tricked Amy Rose and Tekno into helping her steal the Ultragem they succeeded in navigating through the traps to the Ultragem and handing it to Xenor. Xenor revealed herself to be a villain and attacked Amy and Tekno, and in her vanity transformed the castle into Solid Silver! The castle then became reflective and Xenor's own spells destroyed her.