Mill deep, fill the yard with creatures, and drop Siegfried as a towering, graveyard-fed menace.
Sets your commander and theme, then adds about 25 cards that fit plus 20 lands. You fill in the rest.
The top 40 of 305 cards that fit

#11,154$0.38

#4,143$12.77

#2,202$19.64Mikio Masuda

#15,301$0.17Dmitry Burmak

#7,823$4.81Anna Steinbauer

#1,851$5.75

#354$2.25Brian Horton

#617$0.30Canata Katana

#7,459$0.30Jorge Gutierrez Garcia

#2,084$0.35Fay Dalton

#2,296$1.91Izzy

#23,061$0.32Jennifer Hrabota Lesser

#1,901$0.26Chris Cold

#7,298$0.09Lars Grant-West

#3,250$0.28Paulius Daščioras

#10,077

#323$11.89Seb McKinnon

#15,302$0.29Rafal Wechterowicz (Too Many Skulls)

#3,725$0.19Izzy

#2,979$2.26Isabella Mazzanti

#8,055$0.26L.A. Draws

#19,822$0.41Matt Stewart

#7,781$0.37Sean Murray

#260$0.99Anna Steinbauer

#1,341$19.58

#2,813$0.37Taras Susak

#2,403$5.07Kieran Yanner

#10,993$0.72

#1,682$0.28John Thacker

#3,460$0.33Kev Walker

#5,776$0.17

#13,726$0.25David Palumbo

#3,141$0.41Piotr Dura

#4,870$4.69Joshua Cairos

#17,759$0.18Brent Hollowell

#17,747$0.04Viktor Titov

#9,859$0.45Marius Bota

#13,579$0.17Loïc Canavaggia

#4,325$0.33Néstor Ossandón Leal

#19,716$1.20Marta Nael