Field Spell grabs Bloody Doll, Bloody Doll summons Dreary Doll from deck. Go into Fantasix, search Argent Chaos Force detaching Dreary Doll, make Fanatix. Fanatix detaches Fantastix to immediately revive and pop for 750 damage. Then you normal summon Terror Baby and revive Dreary Doll, make Chimera Doll with Baby and Fanatix to search Cattle Scream. Now you need two more Level 8 extenders, one of which can use your additional normal summon, to make Leo using all your Level 8s. Fantasix triggers to summon itself to the opponent's field and adds Argent Chaos Force back. Activate Leo to detach Dreary Doll, then rank him up into Disaster Leo and detach another material to burn for 1000. Next you use Cattle Scream to detach another material and use Dreary Doll in grave to summon herself, overlaying into Giant Grinder. You use the field spell to detach Disaster Leo's final material and revive Fanatix to the opponent's field. Activate Giant Grinder twice to pop both Xyz for 4600 total damage. 4600 + 1000 + 750 is 6350 damage, so the opponent has 1650 LP left and Disaster Leo has no materials, triggering his alternate win con in the end phase.