Sacrifice creatures for value, then bring the best ones back each turn as clattering skeletons to die again.
Sets your commander and theme, then adds about 25 cards that fit plus 20 lands. You fill in the rest.
The top 40 of 676 cards that fit

#5,948$0.30Craig J Spearing

#7,167$4.57Todd Lockwood

#3,058$2.26Tiffany Turrill

#1,392$0.59Zack Stella

#16,768$0.14Eric Deschamps

#1,257$28.93

#3,696$2.39Chase Stone

#5,593$8.30Viktor Titov

#14,819$0.59

#834$23.21Mark Winters

#1,024$14.51Kathleen Neeley & AndWorld Design

#580$19.27Tony Szczudlo

#2,732$6.30Marko Manev

#1,682$0.28John Thacker

#29,252$0.35Cristi Balanescu

#310$55.44See Machine

#2,018$0.15Slawomir Maniak

#12,353$0.29

#9,530$0.52Sandra Everingham

#2,491$3.88Karla Ortiz

#2,995$2.08Milivoj Ćeran

#14,880$0.30Wayne Reynolds

#8,067$2.18

#14,714$0.23Simon Dominic

#257$0.48

#9,658$0.63Daarken

#1,033$0.32

#11,551$1.08Matthew D. Wilson

#1,232$0.61Satoru Senda

#794$8.07Chris Rallis

#4,305$0.33Tyler Jacobson

#23,383$0.21Viktor Titov

#3,494$0.64Tyler Jacobson

#10,202$2.83Randy Vargas

#141$2.61Johannes Voss

#134$8.15Greg Staples

#3,341$1.63

#24,254$0.09Jakub Kasper

#9,529$0.38Andrey Kuzinskiy

#3,915$6.50Mark Riddick