Master Builder Power Up! Level 3 is the ultimate test for Minecraft™ Redstone mastery. Learn everything that's left to know about Redstone with a glossary of advanced wiring concepts and terms. Follow step-by-step instructions to build an incredible 3x3 piston door that will be the envy of your friends. Level 3 concludes with a gallery of inspiring builds made possible with the incredible power of Redstone...power that now you'll fully understand and appreciate.