Geranis Whitemorn wants you to swim to the bottom of the lake east of Suncrown Village and use the Bundle of Medallions on the Altar of Tidal Mastery. Summon and slay the elemental known as Aquantion and return to Geranis.
That willful elemental ended many lives that fateful day when he revolted against us. By calling to the lowly murloc to sabotage our rites he subverted our magic and turned it against us.
Show him our thirst for vengeance has not waned! Take these medallions and lay them at the Altar of Tidal Mastery at the bottom of the lake. Aquantion shall immediately answer your summons!
Beware, <race>! Without our magic controlling him, his wrath will be unrestrained. Destroy Aquantion so we may rest!