• Mokuba requires blue keys to duel at the gate
• Mokuba appears at the gate at stage 13
• Mokuba level 40 appears at the gate upon reaching stage 30
• Kidmodo Dragon could be used in Dragon decks
• Darkflare Dragon also has future potential in Dragon and Black Luster Soldier decks

Strategy

• Special Summon Gate Guardian, draw all the cards in your deck

Last turn

• Summon Gravekeeper's Vassal
• Use Secret Pass to the Treasures and all three Union Attack on Vassal
• Enter Battle Phase, Activate Anti-Magic Arrows
• Attack directly for 9999+ Damage

Replacements

• You can replace any of the Draw cards in the deck with other draw cards such as Jar of Greed, Shard of Greed, etc.
• You can replace one Union Attack with Axe of Despair, Blustering Winds, or Back-Up Rider (Use it on Gate Guardian)

Strategy

• Take 1500 damage to activate your skill
• Use Cloudian - Turbulence and either The Sanctuary in the Sky or Spirit Barrier to stall
• Thin your deck until the last turn (ensure that neither Summoner of Illusions nor Dimensionhole are your last card)

Before Last Turn

• Set Summoner of Illusions facedown and use Dimensionhole to banish it

Last Turn

• Summon Gravekeeper's Vassal
• Flip Summoner of Illusions face-up
• Tribute Cloudian - Turbulence to summon either Blue-Eyes White Dragon or Master of Oz
• Use Secret Pass to the Treasures and both{ Union Attacks} on Vassal
• Attack directly for 9999+ damage

Strategy

• Get Yubel - Terror Incarnate on the field by destroying Yubel in your hand either by the effect of Fire King Island or Fire King Avatar Yaksha.
• Set Sangan to search Yubel or Planet Pathfinder.
• Note: Make sure to keep at least three Monsters (Ideally high Level Monsters) in your hand for Montage Dragon

Last Turn

1. Special Summon Montage Dragon in Attack Position by discarding three (ideally high Level) monsters
2. Summon Gravekeeper's Vassal.
3. Target Vassal with two Union Attack
4. Enter the battle phase, activate Anti-Magic Arrows, and attack the weakest ATK position monster.

Replacements

• My Name is Yubel → Restart (I would remove Nightmare and replace with another Pathfinder in that case).
• Montage Dragon + Sangan + Yubel - The Ultimate Nightmare → The Calculator + Photon Lead + Secret Pass to the Treasures
• Sangan → Flamvell Poun/Planet Pathfinder/Vortex Trooper.
• Photon Lead → Double Summon.