Using the Battle Attack Thor figure is easy! First, find the core (capsule) under his chest. Crush it, and you'll see the amazing gold color transformation in his goo filling. You can also squeeze and stretch Thor up to three times his size. He'll always return to his original shape. When collecting the other Goo Shifters, just follow the same process to activate their unique transformations. As for maintenance, keep these figures away from sharp objects to avoid tearing the stretchy material. Also, don't expose them to extreme heat or cold, as this might affect the goo filling. Have fun with your Heroes of Goo Jit Zu Marvel collection!