Holy flying monkeys! How amazing does Rebecca Mader look as the Wicked Witch of the West on ABC's Once Upon a Time!?!

We were first to reveal that Lost's Rebecca Mader would be joining ABC's smash drama to play the newest villain going up against Storybrooke's forces of good—and now we can finally spill details on her role as The Wizard of Oz's Wicked Witch of the West, a k a Elphaba!

Check out these first look pics of Mader in the iconic role, looking positively terrifying, and fabulous, atop her broomstick. So many chills. Can we call her Elphabulous?!! No, of course we can't.

Immediately following Sunday night's spell-binding midseason finale, Once Upon a Time gave fans a sneak peek at all the magic and mayhem that's coming up in the second half of season three. Including, of course, the introduction of the show's new big, bad, villain: The Wicked Witch. We are told that THE WWOW (you're welcome for another terrible nickname) will square off against Regina, forming a new, formidable opponent to the Evil Queen, now that she and Rumple have made amends.