Mana-doubling lands fuel enormous turns of untapped lands, big draws and huge plays.
Sets your commander and theme, then adds about 25 cards that fit plus 20 lands. You fill in the rest.
The top 40 of 1151 cards that fit

#1,659$3.46Scott M. Fischer

#9,576$4.55Jae Lee

#3,790$0.15Cristi Balanescu

#3,473$0.34Donato Giancola

#21,096$5.33Victor Adame Minguez

#5,839$2.70Aleksi Briclot

#10,932$0.38Michal Ivan

#6,802$3.79Wesley Burt

#7,276$0.40Josiah "Jo" Cameron

#13,305$0.34Justin Sweet

#442$302.69Filip Burburan

#2,473$1.35Heonhwa

#23,284$3.49

#7,329$0.24Chris Seaman

#5,547$0.25Pete Venters

#504$1.98Darrell Riche

#879$0.49Karl Kopinski

#1,019$27.95Jason A. Engle

#2,088$21.44Tuan Duong Chu

#966$1.16Darrell Riche

#6,591$7.96

#5,889$0.22David Gaillet

#13,222$0.21Michele Giorgi

#10,052$0.17Randy Gallegos

#10,880$0.36Liiga Smilshkalne

#20,085$0.26

#2,373$0.23Jason A. Engle

#14,396$0.16Yongjae Choi

#2,987$16.43

#16,090$0.26Jerry Tiritilli

#2,646$2.18Brigitte Roka & Clifton Stommel

#2,091$0.21

#1,753$4.82Karl Kopinski

#18,403$0.22Uriah Voth

#10,176$0.14Dan Murayama Scott

#7,133$0.35

#6,866$46.38

#2,240$0.44Scott Murphy

#227$63.96Jeremy Paillotin

#3,924$0.31Zara Alfonso