Machine King Deck

A Machine King Deck focuses on the three titular cards and swarming the field with Machine-type Monsters. However, this is not limited to your own monsters, you can also swarm your opponent's field and then use DNA Surgery to change them all into Machines.

Strategy
This deck is essentially a Billy Beatdown Deck, as Machine King and it's counterparts all focus on increasing it's own attack through your own field presence. Commonly used with it is DNA Surgery, so that your opponent's monsters are also changed to machines.

Because Machine King and DNA surgery can only benefit/affect face-up monsters, Light of Intervention will immensely help, as well as to get rid of annoying effects. You should have three copies of DNA Surgery and perhaps one or two Light of Intervention to speed this up, as it will allow even Prototype Machine King to gain a substantial ATK boost. United We Stand is also useful, as well as Fairy of the Springs to return United. Big Bang Shot or Fairy Meteor Crush is also useful, as each opposing monster you destroy will weaken your Machine Kings, thus it will be better if you can inflict damage each time they attack.

Because this deck uses DNA Surgery to change Monsters into Machine-type, machine monsters of over 500 ATK are not really needed unless they have a substantial ATK or effect. Gilasaurus and Inferno Reckless Summon can put more monsters on your opponent's field. While this is normally a bad thing, each monster will grant Machine King an additional Attack boost. The popular Ojama Trio and Final Attack Orders can also be used to inflict more damage, while gaining you more ATK boost.

Advantages and Disadvantages
This deck is a good counter to type-specific decks, such as plant, and to Swarm Decks, as they will simply fuel the effect of Machine King. Uria is also semi-compatible, as there are many continuous Trap Cards that are crucial for this deck. Light of Intervention will also cripple most Rock Decks.

However, this deck is weak against mass trap removal, which is quite common. Perfect Machine King, in particular, is a level 8 monster, making it somewhat hard to summon considering it has no uniquely easy way to bring out. It is also vulnerable to most card-destruction effects, as it's one of the few newer two-tributers with no innate effect negation destruction. Machine King, as well, is particularly weak even with it's effect, as it's ATK is lackluster to begin with and it's boost is not substantial (unless you swarm your opponent's field, you'd be better off using frostosaurus).