This video shows you how to get all the Abyssal Armor pieces.
Q: How do I get back to Eden?
A: The serpent hole that takes you to Eden is where Azrael waits for you to assemble the Armageddon Blade in the Leviathan Drift.
Q: How do I get to the Iron Canopy?
A: Go to the Ashlands and charge over the invisible bridge with Ruin.
Q: How do I get to the Black Throne?
A: Use the serpent hole that Samael created in Scalding Gallow.
Q: How do I get to the Hollows?
A: You get there from Anvil's Ford. Look for the big hole on the map and jump down it.