Wrath Shard 2
Requires: Abyssal Chain, Voidwalker
Use Voidwalker to create a portal up on the inaccessible platform. Then, backtrack to where you got the Champion artifact in the turbine room (see above). Put a portal on the ceiling above the Shadowglide elevator, and launch yourself up and into the ceiling portal. You'll pop out on the inaccessible ledge and find a chest containing a Wrath shard.
On the way to Dry Road, you reach a spot where you must climb a wall and then leap over to a drain pipe. After you jump into the pipe, turn around and look behind you. Bam! Soldier artifact, and that's a fact.
Abyssal chain required. In the big turbine room on the way to Drowned Pass, look for the low opening that has no platform. Shadowglide into the opening, then use the chain to grapple up to the platform. Jump up and follow the corridor to the Champion artifact.