Flood the board with tokens, tag them with counters, and tap the whole swarm for mana.
Sets your commander and theme, then adds about 25 cards that fit plus 20 lands. You fill in the rest.
The top 40 of 688 cards that fit

#7,383$0.25James Bousema

#5,237$1.90Raymond Swanland

#3,031$0.46Raoul Vitale

#1,304$1.23Yongjae Choi

#6,434$2.68Kim Dingwall

#295$0.43Zoltan Boros & Gabor Szikszai

#5,579$3.99Chippy

#5,839$2.70Merwan Chabane

#12,023$87.92Kev Walker

#8,766$1.76Kev Walker

#1,426$0.50Scott M. Fischer

#6,483$2.78Kev Walker

#2,774$13.58Tuan Duong Chu

#1,522$0.30Adam Paquette

#9,284$0.89Francis Tneh

#6,382$0.33

#1,708$0.22Martina Pilcerova

#7,837$0.35Cristi Balanescu

#7,381$6.16Leesha Hannigan

#4,042$0.95Dominik Mayer

#2,256$1.28Nicholas Gregory

#10,061$1.29Ryan Yee

#2,059$1.84

#12,932$0.19Kev Walker

#8,441$0.87Cristi Balanescu

#3,763$1.41Chase Stone

#3,500$1.51

#2,101$0.37CatDirty

#6,438$0.32Fajareka Setiawan

#5,151$0.36Simon Dominic

#1,855$0.31Xavier Ribeiro

#4,077$0.74Heonhwa

#7,630$0.71Ron Spencer

#7,532$0.38

#2,473$1.35Heonhwa

#2,308$0.95Pete Venters

#4,779$0.34Valera Lutfullina

#14,591$0.14

#2,272$2.56Mark Zug

#7,957$0.66Daniel Ljunggren