Lightning struck Kaishin and Shiranui felt he had to make the next attack count otherwise lightning would strike twice and he'd lose the battle.  "Kaishin, Blizzard!" Shiranui called, doubting Sheer Cold would hit twice in a row.  Since Kaishin was faster, the Primal Kyogre summoned a Blizzard that compounded the torrential rain.  Electricity was arcing between Goodra's horns as the sky above the battlefield was lighting up to deliver the lightning strike that would knock Kaishin out.