Dump the top of your library into the graveyard and feast on what rots down there.
Sets your commander and theme, then adds about 25 cards that fit plus 20 lands. You fill in the rest.
The top 40 of 736 cards that fit

#3,372$0.30Zoltan Boros

#9,347$0.39

#4,636$1.05Ron Spencer

#4,143$12.77Benangbajastudio

#2,278$9.70Josh Newton

#2,202$19.64Mikio Masuda

#2,002$0.41Yongjae Choi

#7,823$4.81Anna Steinbauer

#11,154$0.38

#4,790$0.87Psydrian

#4,930$0.45

#9,124$0.31

#11,952$0.30

#11,137$0.20Mathias Kollros

#15,301$0.17Dmitry Burmak

#354$2.25Brian Horton

#2,473$1.35Heonhwa

#710$5.14Terese Nielsen

#2,084$0.35Fay Dalton

#1,879$11.26

#588$4.81

#618$19.99Warren Mahy

#5,213$0.23Jehan Choo

#2,296$1.91Izzy

#1,507$2.50Mark Winters

#2,776$0.85Greg Hildebrandt

#1,851$5.75

#15,697$1.89Warren Mahy

#2,346$77.29Pete Venters

#8,710$0.46Bryan Sola

#1,901$0.26Chris Cold

#5,480$0.27Eric Deschamps

#323$11.89

#5,870$0.19Justine Mara Andersen

#29,270$0.40Kaitlyn McCulley

#4,065$0.33Jehan Choo

#7,298$0.09Magali Villeneuve

#9,040$0.25Mark Hyzer

#7,779$0.36Bartek Fedyczak

#3,313$5.06Simon Dominic