Dragon Ruler

"Suppressor Dragon" ( Seiryū) is a series of Level 7 Dragon-type Effect Monsters.

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

Four monsters in this series were released so far: "Blaster, the Flame Suppressor Dragon " (FIRE), "Tidal, the Waterfall Suppressor Dragon " (WATER), "Tempest, the Storm Suppressor Dragon" (WIND), and "Redox, the Rigid Suppressor Dragon" (EARTH).