Lily felt around the main entrance, and there wasn't even a small crevice on it . The whole thing had been soldered to death in a flash, not to mention the lock, there wasn't any chink between the door and its frame . She listened to the particularly clear and sharp sound of tick-tock coming from the rear, sounding as if it was hurrying her into her way to death . Lily anxiously and firmly smacked the iron door and then quickly prepared to insert the ring she wore on her hand, but she realized that it didn't work at all . It wasn't piercing through as the whole door was extraordinarily thick and it was also made of excellent steel . The force of the thing on her hand was utterly useless .