Pioneer Amalia Benavides Aguirre Cori-Steel Cutter Expressive Iteration Field of the Dead Geological Appraiser Heartfire Hero Jegantha, the Wellspring Karn, the Great Creator Kethis, the Hidden Hand Leyline of Abundance Lurrus of the Dream-Den Nexus of Fate Oko, Thief of Crowns Once Upon a Time Sorin, Imperious Bloodlord Teferi, Time Raveler Underworld Breach Uro, Titan of Nature's Wrath Veil of Summer Wilderness Reclamation Winota, Joiner of Forces It's easy to see a pattern in the spells banned in Pioneer
Gemstone Mine is unique in that it has a limited number of taps due to relying on mining counters that reduce every time it is tapped, it enters with three counters and gives one mana of any color when tapped
The Fourth Doctor + Displacer Kitten + Sensei's Divining Top + Gran-Gran Doctor Who 's MTG crossover produced a fun card in The Fourth Doctor, which creates Food Tokens once per turn if you play a historic spell from your hand or the top of your library
For more detailed instructions on mana base construction be sure to read my full explanation of the topic in my first article here
Punishing your opponents for searching their library is also some tremendous upside in Commander, where tutors and fetch lands are ubiquitous
