Man...I thought "Reverie" was a disappointment. This DLC is by far the better ripoff. For $10, you get TWO small levels, which basically are composed of frustrating platformer sections and a frustrating boss fight. A skilled player can beat these 2 sections in probably less than half an hour. For $10, that is bad. Average players will take longer, but that's only because these sections are monumentally difficult to overcome.
If you're desperate to play the LORD OF SHADOWS DLC, just find a copy of the COMPLETE COLLECTION for a cheap price. At least that also includes an HD Upgrade of the 3DS spinoff, MIRROR OF FATE, which will seem like a blessing after enduring these two lackluster additions.