Remember the Floormakers in Level 8 from Link's Awakening, where the machine would put a walkable floor down over pits/lava, which was sometimes used as the solution to puzzles if all the pit combos were covered, and self-destructed when it hit a walkable floor? That's all I ask for, something that would work just like this as an FFC along with a script that would recognize when certain combos were eliminated, causing to trigger an item/secret combos to appear.