|No box reset needed|
Fast farming deck that doesn't require any character specific skills. Against level 40, you'll need to get Transmodify early since you can't stall the turns by simply using an 1800 attack monster. Odion has 3 attack increasing equip cards, which also means that you need to finish the duel early before he stacks all 3 on 1 monster to get over your Tethys. For a more safer farm attempts, you can duel against lvl 30 instead.
Summon the unhappy girl, or rai-mei if you don't have her, and pass the turns to stall the duel until you can perform the gravekeeper vassal and union attack combo. Once you summon the unhappy girl, set rai-mei again once you have enchanted javelin to raise your LP. This will make sure Odion won't attack, otherwise pumpking with castle of illusions to deal more than 5000 damage with 3 monsters.