While she isn't easy to cast at eight mana, she's incredibly resilient once she hits the table
Though it's considered too expensive by many modern standards, it's still a reliable way to refuel and stay alive in the lategame
With some more research, and conversation, and distributors, Im revising that to double the print run, at 2.5 million Collector Booster packs
Its a great time to be playing Magic and Khans of Tarkir is a big reason why
I would expect a deck with a 40-land count to either be a Lands deck or at the very least have a couple of cycling lands tossed in there to prevent flood like Polluted Mire but there are none here
Interestingly, Penance began to rise in value long before the Miracle Worker deck was fully spoiled on September 10