This is part 18 of my 100 Super Mario 3D World Walkthrough. br This part includes World 7-C "Fire Bros Hideout #4", World 7-6 "Rammerhead Reef" and World 7-7 "Simmering Lava Lake", World 7-Castle "Bowser's Lava Lake Keep". br Below are the times when I get the stamp and green stars in each level. br br 00:20 - World 7-C - Fire Bros.