Requirements
* Level Eater and Light Dragonstar Rifun (or some other level 1 tuner) must be in your Graveyard.
* You must control Shining Dragonstar Shofuku.
* You must have Junk Synchron in your hand, and you must not have normal summoned yet.
How To Do
Reduce Shofuku's level by 1 to SS Level Eater. Use Shofuku's effect, destroying Level Eater to SS the level 1 tuner (let's say it's Rifun). Synch them into another Shofuku, shuffling 1 of their cards into the deck. Repeat the process until you're on your last Shofuku. Reduce its level by 1 to SS Level Eater, destroy it to SS Rifun, then reduce Shofuku's level to SS Level Eater. Synch Rifun and Shofuku to make Power Tool Dragon, then search for Symbols of Heritage. Activate it and get back a Shofuku. Use its effect, destroying Level Eater to SS Rifun. SS Level Eater by reducing Shofuku's Level (now 7). Make Formula Synchron, then reduce Shofuku's level (now 6) to SS Level Eater, then synch Formula and Level Eater to make Mist Bird Clausolas. Use its effect on whatever. Normal Summon Junk Synchron to SS Level Eater, then go into Wave-Motion Phonon Dragon. Reduce Shofuku's level (now 5) to SS Level Eater. You can then make Quasar with Shofuku, Clausolas, and Phonon. Now you've got Quasar and Power Tool Dragon with one of their monsters (if they still have any after Shofuku messed up their field) having 0 ATK and a negated effect. If you lose at this point, you're not playing the game right.
Of course, you don't NEED Power Tool Dragon, but having the extra 2300 ATK always helps.
Assuming your opponent uses Maxx C when you use Level Eater's effect for the first time, you let your opponent draw almost half their deck. You might not even need to attack with Quasar if it's late enough in the game.