Simplified list
Monsters
2 Level 5 warriors
7 Level 1-4 monsters with 1400 defense and no activatable effects
1 Gravekeeper's vassal
Spells and traps
1 Cosmic cyclone - To bait out Ultimate providence
1 Feast of the wild Lv5
2 Union attack
1 Secret Pass to the treasures
3 Defensive backrow to stop Mystic Tomato, Widespread ruin and Wall of disruption are the best
2 Empty slots
1. Wall with 1400 attack monsters and backrow. If all mystic tomatoes are dead then don't set anymore monsters. When you are stalling DO NOT PUT MORE THAN TWO MONSTERS ON BOARD 2. When you have no cards left, activate cosmic cyclone or hey trunade. Yubel will waste her providence.
3. Activate Feast of the Wild(s) and summon 2 warriors in attack mode.
4. Standard farm shenanigans with Vassal.
How do you summon Vassal? If I'm not mistaken on the final turn you should have the 1400 def Monster on field. After activating Feast, how do you destroy the monster and summon Vassal? Or do I need to hope that Yubel destroys my monster?