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Speak to Spearhead at the Hidden Shelter (+187, -237, +185). To reach this area you jump down the waterfall in the pond near the entrance of Tenebrous Tangle. (This is for Qeynos allies only. Freeportians start the Quest at the Freeport Emissionary - quest may vary)
He asks you to investigate the ten pillars they are at:
(84, 57, -12)
(101, 57, 9)
(119, 57, 0)
(136, 57, -2)
(127, 57, -8)
(128, 57, 3)
(114, 57, 3)
(109, 57, 4)
(100, 57, 4)
(92, 57, -2)
After this you must kill 6 storm cells, up above the waterfall. Next is to find four sacred stones at the bottom of the pond (-12, -134) where the storm cells populate. Picking these up will spawn The Creature of the Black Pond, a level 57-58 heroic ^^ mob.You do not need to kill him, simply to return to Spearhead for your reward. This also opens up the Mysterious Stones quest.
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