Sacrifice your own lands for value and let Marwyn haul them back from the grave.
Sets your commander and theme, then adds about 25 cards that fit plus 20 lands. You fill in the rest.
The top 40 of 249 cards that fit

#16,768$0.14Eric Deschamps

#3,696$2.39Chase Stone

#13,327$0.27Darrell Riche

#310$55.44

#636$1.44Douglas Shuler

#2,049$12.67Daarken

#134$8.15Greg Staples

#1,322$8.50Jimmy Knives

#1,862$0.25Ryan Yee

#710$5.14Terese Nielsen

#2,473$1.35Heonhwa

#4,077$0.74Heonhwa

#3,134$0.75Bastien Grivet

#8,885$1.86Chris Dien

#601$26.39AKQA

#5,725$0.24Raymond Swanland

#2,587$3.72Tomasz Jedruszek

#1,285$43.41Joseph Meehan

#618$19.99Warren Mahy

#929$2.93Leon Tukker

#8,173$22.61Devin Toye

#16,782$1.94Carl Critchlow

#4,563$0.35

#4,460$3.84Alix Branwyn

#8,381$0.57

#7,202$0.89

#693$12.02Grzegorz Rutkowski

#426$0.43WFlemming Illustration

#15,943$0.18

#4,441$10.73Games Workshop

#562$1.16

#487$4.83Mark Behm

#15,321$0.38Jesper Ejsing

#9,937$0.16

#6,438$0.32Fajareka Setiawan

#5,464$1.39

#3,629$0.15

#25,904$0.21Bryon Wackwitz

#2,149$0.27Adam Paquette

#10,720$0.13Matt Stewart