How to Breed Mercury Dragon in Dragon Story Posted on October 13, 2012October 16, 2012 by wbangca Related Post MARVEL Future Fight! Overview & Age of Ultron Limited Time Package Deadpool Event//Winter Soldier Review – Marvel: Contest of Champions 4 Star Characters Supply & Demand – Marvel: Contest of Champions School of Dragons – Sand Wraith Baby! I got Electro – Marvel: Contest of Champions How to breed a Mercury Dragon in Dragon Story breeding guide video. Use a Diamond Dragon + a Water Dragon. Left or right does not matter.