In 2015 this question was asked, so I created the tag wotl-eternal which was a free DLC for The binding of Isaac, and an improvement for Wrath of the lamb DLC.
At that time we still had the 25 characters limit for tags, so I had to improvise. Since I can't suggest a tag synonym (I miss 5 score in the above-cited tag) I think it's time to fix that, too.
My suggestions are: