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Shooting hundreds of Shadow Thrall with Sturm and Drang to activate the Sturm Catalyst. This was done in the special version of the Corrupted strike, which is part of the Malfeasance quest line.
When you get to the long, curved staircase – there you can farm infinite Shadow Thrall. If you crouch at the apex of the bend, then the ammo crates will drop down onto you as well!
It takes a little while to safely get to this spot, so go slow and steady!
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