How to beat/farm Bandit Keith Lvl 40

• Dueling against Bandit Keith can still rely on luck due to the nature of his coin toss tactics.
• Use the lower level monsters as protection and to also thin your deck.
• Take 1800 damage by either letting him attack you, or use Mirror Wall during the end of his turn, and pay the cost on your turn.
• Use the skill Reinforcements to get Plasma and special summon him if Keith has Blowback Dragon, or Barrel Dragon.
• If you summon Destiny HERO - Plasma to take control of Blowback Dragon, you will still need to use defensive spell/trap against his Barrel Dragon since he can still get over your Plasma using his spell/trap cards.
• On your last turn, special summon Desert Twister and normal summon Gravekeeper's Vassal. Use Secret Pass to the Treasures and double Union Attack to go for the win.

Use the lower level monsters and keep destroying keith's monsters. Don't attack if he has a face-down trap since it could be rare-metalmoprh. Set a magnetic mosquito if you think he will tribute summon either blowback or barrel dragon. Use acid raid if you don't have mosquito to destroy his tribute monsters. It's best to summon BEUD during second to last turn to avoid it getting destroyed early. On the last turn, summon vassal and use the union attack combo.

Summon either the hunter or jerry and destroy keith's monsters when they are in defense position to not lower his LP. If they are summoned in attack position, switch it to defense using otohime on the next turn. Acid raid if their attack is higher than yours, or mirror wall to defend as well as reducing your LP. Lower your LP to more than half of keith's LP and keep destroying his monsters so the BEUD can get a direct attack to deal 10,000 damage after equipped with sword of deep-seated.

• Machine Dragon monsters

  Keith uses three machine dragons: Twin-Barrel, Blowback, and Barrel. Those monsters have high ATK in current card pool and effects destroying cards you control additionally.

• Machine and coin toss supports

  He enhances his Machine monsters' stats and effect by using equips cards for Machine-type monsters and Second Coin Toss.

• Use equip spells

  Since the ATK of Twin-Barrel Dragon is 1700 and same to that of Axe Raider, the highest ATK level 4 monster you can get, you need to use equips spells or other ATK boost cards to get your monsters to defeat the dragon.

• Use Spell/Trap removals

  Destroying Keith's Machine Conversion Factory, Second Coin Toss, and Rare Metalmorph is important to help your monsters to beat Keith's Machine monsters.