It’s back! Blizzard have re-eneabled Twilight Warding after (hopefully) fixing the issue where it was causing player deaths from reflected damage, even in Hardcore! Decay Augmentation is next on the list, as it hasn’t been fixed yet and so remains disabled.
Update 2/4: (since Patch 2.1.1)
We’ve enabled Twilight Warding as of today and you should now be able to see this available on your end. Decayed Augmentation is the next on the list and is currently slated to be enabled again in an upcoming Hotfix.
Thanks again to everyone for your patience and attention on this. We’ll keep you posted on any new updates that come in.