Here's a couple examples of how the items scale up to Epic Elite. Since I don't want to spoil all the fun, I'll leave discovering the rest up to you guys.
I did however want to show you the feedback in the item tooltip about the difficulty of the quest the item was from, since it is not in the build currently on Lamannia. You will notice it in the top right corner of the item tooltip. We hope to get that portion of it on Lamannia as soon as we can.
FYI: The new Toxic mutation is an on-hit proc that creates an AoE damage over time cloud, dealing significant acid damage over 10 seconds. It does damage enemies who are immune to poison. The constitution damage portion of it is the only part that is blocked by poison immunity.