Dragon Ruler

"Dragon Ruler" (征(せい)竜(りゅう) Seiryū) is a series of Dragon-Type Effect Monsters comprised of two smaller groups: Level 7 monsters whose ATK and DEF always have a sum of 4600, and lower-Level monsters that act as miniatures of the Level 7 monsters.

The "Dragon Rulers" all share three peculiarities: "If this card is in your hand or Graveyard: You can banish a total of 2 [corresponding Attribute] monsters and/or Dragon-Type monsters from your hand and/or Graveyard, except this card; Special Summon this card." "During your opponent's End Phase, if this card was Special Summoned: Return it to the hand.", "When this card is banished: Add 1 [corresponding Attribute] Dragon-Type monster from your Deck to your hand. You can only use 1 "[corresponding Dragon Ruler]" effect per turn, and only once that turn.", and a variable effect that triggers upon sending it and 1 other corresponding Attribute monster from your hand to the Graveyard.

The four Dragons are of different Attributes, excluding LIGHT and DARK: "Blaster, Dragon Ruler of Infernos" (FIRE), "Tidal, Dragon Ruler of Waterfalls" (WATER), "Tempest, Dragon Ruler of Storms" (WIND), and "Redox, Dragon Ruler of Boulders" (EARTH).

These Dragons are then supported by four "younger" versions of themselves: "Stream, Dragon Ruler of Droplets" (WATER), "Reactan, Dragon Ruler of Pebbles" (EARTH), "Burner, Dragon Ruler of Sparks" (FIRE), and "Lightning, Dragon Ruler of Drafts" (WIND). Each dragon can Special Summon one Level 7 "Dragon Ruler" of the same Attribute from the Deck, though that monster cannot attack that turn.
Weaknesses and Counter-Strategies

Cards that can shut down or slow this deck are cards that stops the opponent from banishing, discarding, or prevent Special Summoning. Having both a "Mind Drain" and "Soul Drain" on the field will completely shut down this Deck, but "Heavy Storm", "A Wingbeat of Giant Dragon" , Mystical Space Typhoon", "Dust Tornado" and "Royal Decree" can eliminate this threat. While "Mind Drain" is active on the field you'll be prevented from using "Dragon Ruler" effects that banish/discard from the hand because monsters in the hand cannot activate their effects due to "Mind Drain" being active on the field. While "Soul Drain" is active on the field you'll be prevented from using "Dragon Ruler" effects that banish/add from activating from the Graveyard and Banished Zone. Lastly, cards that prevent players from Special Summoning, such as "Archlord Kristya", "Evilswarm Ophion", "Fossil Dyna Pachycephalo" and "Crimson Blader" can prove problematic as this Deck relies heavily on Level 7 and higher monsters. "Dragon Capture Jar" can also prevent your Dragons from attacking. "Summon Limit" also prevents an opponent from Xyz Summoning Rank 7 monsters because normally a player would Special Summon 2 "Dragon Rulers", then performing an Xyz Summon. "Summon Limit" will also affect your own Summons so Decks that rely on swarming should be careful with that card as well. "Summon Breaker" is also an option. Also, "Imperial Iron Wall" can shut down most cards in this Deck. "Goblin of Greed" also prevents the player from using the effects of the Baby "Rulers", or the discard effects of the "Rulers" themselves.

To prevent the problems above, it is best to main Deck "Mystical Space Typhoon" and "Heavy Storm" while using the effect of "Blaster, Dragon Ruler of Infernos" to destroy opposing monsters that would disallow your Summons. "Skill Drain" will also prove to be a very useful Side Deck card as it can easily disrupt your opponents plays/counters while doing hardly anything to your Deck's performance, for the "Dragon Rulers" have only one effect that activates on the field (the last one which returns them to the Hand), and this is easy for the "Dragon Ruler" player to play around. Be warned, however, that "Skill Drain" may conflict with any effects of Xyz monsters you may wish to summon, so you will need to change your gameplan.

Monsters

Blaster, Dragon Ruler of Infernos
Burner, Dragon Ruler of Sparks
Debris Dragon
Eclipse Wyvern
Effect Veiler
Exploder Dragon
Flamvell Guard
Light and Darkness Dragon
Lightning, Dragon Ruler of Drafts
Reactan, Dragon Ruler of Pebbles
Red-Eyes Darkness Metal Dragon
Redox, Dragon Ruler of Boulders
Stream, Dragon Ruler of Droplets
Tempest, Dragon Ruler of Storms
Tidal, Dragon Ruler of Waterfalls

Extra Deck:

Fusion Monsters:

Five-Headed Dragon

Synchro Monsters:

Black Rose Dragon
Celestial Dragon
Crimson Blader
Jewel Flare Dragon Stardust
Red Dragon Archfiend
Scrap Dragon
Stardust Dragon
Trident Dragion

Xyz Monsters:

Gaia Dragon the Thunder Charger
Mecha Phantom Beast Dracossack
Mermail Abyssgaios
Number 11: Big Eye
Number 7: Lucky Straight

Spells

Burial from a Different Dimension
Dragon's Mirror
Foolish Burial
Gold Sarcophagus
Sacred Sword of Seven Stars
Super Rejuvenation

Traps

Breakthrough Skill
Dragoncarnation
Return from the Different Dimension
Royal Decree
Dragon's Rebirth
Dragon Ravine