Theres also the incredibly eerie Skullclamp reprint, which appears to be some sort of cybernetic skull creature
Compared with Teysa Karlov, Lavinia, Azorius Renegade, Judith, the Scourge Diva and Nikya of the Old Ways, Zegana is pretty disappointing, but I still think she has some utility and having 3 abilities rather than 2 somewhat makes up for her lack of raw power
We do know that the mage-rings play an important role and that they're used to gather mana
Archangel Elspeth Elspeth Conquers Death Elspeth Resplendent Elspeth Tirel Elspeth's Devotee Elspeth's Nightmare Elspeth's Smite Elspeth's Talent Elspeth, Knight-Errant Elspeth, Storm Slayer Elspeth, Sun's Champion Elspeth, Sun's Nemesis Elspeth, Undaunted Hero
You can also try to get a Support character like Huey or Dewey out on turn two or three to ensure that your four-cost character can banish whatever Maid Marian targets, but a Maui, Soaring Demigod will almost always do the trick