Brahne, Garnet's adoptive mother and the power-hungry Queen of Alexandria
Breach the Multiverse costs seven, has each player mill ten, and you can choose a dork/planeswalker from each graveyard and send it to your side
Regirock can be obtained from Space-Time Smackdown: Dialga and Space-Time Smackdown: Palkia packs in the Space-Time Smackdown set
It was first introduced in the Primal Clash expansion
Advanced Search Sets Random Syntax Amped Raptor Belligerent Yearling Bonded Horncrest Bonehoard Dracosaur Burning Sun's Avatar Charging Monstrosaur Charging Tuskodon Cloudpiercer Dinotomaton Dracosaur Auxiliary Dromosaur Etali, Primal Conqueror Etali, Primal Storm Feisty Stegosaurus Flaming Tyrannosaurus Frenetic Raptor Frenzied Raptor Frilled Deathspitter Giant Cindermaw Gnathosaur Hunting Velociraptor Kephon, Rage Incubator Magmasaur Marauding Raptor Mastercraft Raptor Momentum Rumbler Needletooth Raptor Nest Robber Orazca Raptor Panicked Altisaur Pyroceratops Rampaging Ceratops Rampaging Ferocidon Rampaging Raptor Raptor Hatchling Ridgetop Raptor Ripscale Predator Sawhorn Nemesis Scytheclaw Raptor Seismic Monstrosaur Shivan Raptor Silverclad Ferocidons Stampeding Horncrest Stegron the Dinosaur Man Sun-Collared Raptor Sun-Crowned Hunters Surly Badgersaur Thrash of Raptors Trumpeting Carnosaur Tyrox, Saurid Tyrant War-Trained Slasher Wrathful Raptors Yidaro, Wandering Monster Yidaro, Wandering Monster Zog, Triceraton Castaway
In fact, I would tend to prefer a 3-mana Walker that does this with a +1 over a 5-mana Walker that just draws a card and mills one (Jace, Memory Adept)
