Gate of Moonless Night: When you put a Magic Tool into the battle zone, you may choose 2 of your Magic Tools from the battle zone and your graveyard and summon this creature from your hand or graveyard onto those 4 cards for no cost.
The deck aims to have copies of these Magic Tools in the battle zone as well as your graveyard in order to summon 卍 De Szark 卍 or Bangetsu 卍 Ga・Ryuzark 卍 / Bangokusatsu. A combination of De Szark and Ga Ryuzark should lock down most offense and options of their own, making reversal potentially difficult.
However, just like most board control decks it has no resistance against reversal, so some situations such as a Ragnarok, the Clock when the player has no shields is lethal. Additionally, Jokers that are seemingly designed to counter it are prevalent in the metagame, namely Diceclops and Pokchinchin, with the former removing all of its finishers in just 2 mana and the other shuffling the player's graveyard fodder back leaving the finishers inaccessible as well as stopping the spawning of Gate of Moonless Night finishers itself.
Due to the Mafi Gang needed for the Gate of Moonless Night ability, the deck is notable for heavily consisting exclusively of cards from the Duel Masters and Twinpact Series blocks (except Hyperspatial Revive Hole and Tigernitro, Explosive Devil), making it an ideal candidate for the 2 Block Constructed format as well.
Ze-ro basically uses this decktype in the Twinpact Arc, aside of a few odd choices. His strategies for using this deck isn't too far from how an actual player would, going for board control and one shot for finish.