Make everyone discard and sacrifice, then reanimate the best corpses from the pile before anyone else can.
Sets your commander and theme, then adds about 25 cards that fit plus 20 lands. You fill in the rest.
The top 40 of 404 cards that fit

#4,790$0.87Psydrian

#2,001$6.20Ricardo Cavolo

#14,592$0.11Karl Kopinski

#8,455$0.91Ben Wootten

#14,766$0.24Jason Rainville

#5,785$0.47Anato Finnstark

#14,526$0.99Deruchenko Alexander

#4,982$0.24Wayne England

#3,058$2.26Tiffany Turrill

#2,084$0.35Fay Dalton

#14,534$2.21Greg Staples

#1,232$0.61Satoru Senda

#7,751$0.30Martina Fačková

#5,593$8.30

#960$28.70Dmitry Burmak

#223$7.15Anson Maddocks

#2,850$2.57Yongjae Choi

#1,572$17.55Yongjae Choi

#11,473$15.33Martin Ansin

#323$11.89Seb McKinnon

#1,980$0.34Ravenna Tran

#725$19.08

#538$0.51Svetlin Velinov

#2,296$1.91Izzy

#4,014$0.38Mark Brill

#4,785$4.05Lucas Graciano

#11,419$0.27

#4,005$0.57Dana Knutson

#4,985$0.31Michal Ivan

#9,040$0.25Mark Hyzer

#354$2.25Brian Horton

#14,022$0.19Slawomir Maniak

#458$3.12Mark Winters

#8,895$0.22Titus Lunter

#8,231$0.34Whit Brachna

#713$7.63Yeong-Hao Han

#7,620$0.58Seb McKinnon

#3,435$0.90

#11,438$10.49Brian Snõddy

#10,993$0.72