Speak to Klodsag at ( -62, -16, -16 ) Copy/waypoint -62, -16, -16. Note: If you forget to talk to him, the quest doesn't break. If you ran all the way around and didn't find a chest, you probably forgot to talk to him first. Talk to him and then go back for the chest. It looks and behaves like "void shard' chests, with an onscreen message.
Head north over the bridge and kill the Primordial Malice to spawn Gatekeeper Karatil.
Take the left corridor to the west.
The ground gets icy/slippery past ( 227, 11, -639 ) Copy/waypoint 227, 11, -639. Only flat ground is slippery. The ramps are not.
Travel up around the tower (the ramp up starts near ( 735, -17, -721 ) Copy/waypoint 735, -17, -721).
Use the teleporter at ( 726, 198, -719 ) Copy/waypoint 726, 198, -719.
Kill Auliffe Chaoswind at the top of the tower.
This a joust fight, where you need to move inside the white circle, and outside the red circle.
When the boss says "I am not locked in here with you, you are locked in here with ME!", move inside the white circle (a swirling wall of snow) or die. Note that the wall is always inside the room, but not necessarily near the boss.
When the boss says "Back off! Let's see how well you scramble!", move outside of the red circle before it disappears or die.
The key is to slow burn, about 10-15%, otherwise there can be both white/red joust rings. If you are at a higher level, use auto attack only.
Loot the key from his body and look for his treasure chest at the base of the tower.
Go south and kill Elif Whitewind near ( -3, 10, 451 ) Copy/waypoint -2.68, 10, 451.
Constant DoT damage plus significant power drain
Head left/east at the fork
Be careful crossing the bridge as the wind can blow you off if you don't stop moving. Holding the spacebar down while running in the middle of the bridge will keep you from getting thrown off. Turning off your mount also helps.
"You feel unsteady on your feet as heavy winds gust by you!"
Kill The Hurricane that paths clock-wise around the base of the tower.
Has a trama det power drain
Go back across the bridge to ( -274, 9, 684 ) Copy/waypoint -274, 9, 684 and hail a Wind Spirit.
Have it escort you through the storm.
Each time you land on a platform, kill the Bastion Windcaller and hail the next wind spirit.
There are 4 such platforms.
Kill Yveti Stormbrood that flies around on top and loot his body for the key.
Yveti is only in range for pulling from the top platforms, where you can be blown off if you move after the gust warning (blue body shimmer). You can pull with Mercenary
It's easiest to target Yveti while you are flying towards the top platform.
Take the teleport pad at ( -662, 310, 636 ) Copy/waypoint -662, 310, 636 back to the entrance.
Return to the bottom of the tower (east) and find the chest for the funnel iron shavings.
Return to the path going west and kill Laef Windfall near ( 554, -16, 633 ) Copy/waypoint 554, -16, 633.
He casts a frontal stun after the message "Laef Windfall prepares to unleash a barrage of powerful wind in front of him! You might want to try to avoid this!". He is immune to damage during his frontal.
The stun is not curable (there is no detriment) and will persist for a while even after he dies.Consider rooting him and keeping away.
Go up the ramp to the top of the tower, killing trash on platforms to the teleport at ( 720, 198, 718 ) Copy/waypoint 720, 198, 718. NOTE: The only really dangerous spot as you go up is the area with the moving lightning storms (after using the teleporter). If one hits you, it does 23-30 million damage, likely killing damage. Avoid them, there's only one platform with killer lightning bolts.
Torstien Stoneskin and Hreidar Lynhillig protect each other.
One or the other periodically gets more damage reduction then the other. If you notice one taking less damage, you can swap, or you can just burn one and then swap to the other. Both have to be at 1% before either will die.
Loot the key off their corpse.
Take the portal that just spawned to Thunder Coliseum
Loot Shard of Glowing Arcglass from the chest at the base of the tower.
The chest location is random.
Return all 4 components to Klodsag in the center ( -61, -17, -12 ) Copy/waypoint -61, -17, -12 and he will make Staff of the Rainkeeper
Use the new portal at ( -158, -19, -3 ) Copy/waypoint -158, -19, -3 to Tower of the Rainkeeper
Kill all the Primordial Malice.
You can body pull them if you don't want to kil the giants.
Go through the passage at ( -28, 994, 21 ) Copy/waypoint -28, 994, 21.
Listen in on conversation between Agnarr, Lanys T'Vyl, and Karana. Then hail Karana and give him the repaired staff. He will teleport you back to the Coliseum of Valor