Isao claims no allegiance, so fill the deck with legendary heroes who answer to no lord.
Sets your commander and theme, then adds about 25 cards that fit plus 20 lands. You fill in the rest.
The top 40 of 124 cards that fit

#477$2.85Gabor Szikszai

#5,746$0.30Anna Steinbauer

#5,358$3.97Dany Orizio

#8,681$0.32

#742$1.10Lindsey Look

#6,553$0.36Wangjie Li

#4,330$16.40Edward P. Beard, Jr.

#3,925$0.57Adam Paquette

#149$25.78Heather Hudson

#14,174$0.29John Tyler Christopher

#10,128$5.58

#10,236$20.97Oiya Zhang

#3,468$5.44Irvin Rodriguez

#6,295$0.60Wisnu Tan

#353$2.66Richard Kane Ferguson

#6,096$1.00Noah Bradley

#1,820$0.37

#1,705$5.59Néstor Ossandón Leal

#3,061$5.57Thanh Tuấn

#14,849$0.80Jason Chan

#727$5.00Victor Adame Minguez

#203$86.70

#1,672$9.32Vincent Proce

#12,309$29.08Wero Gallo

#11,033$11.73Chris Seaman

#76$48.97

#238$30.59Igor Krstic

#3,542$4.66Chris Rahn

#1,053$1.43Kev Walker

#2,707$0.53Willian Murai

#535$0.77Russell Dongjun Lu

#9,063$0.30Néstor Ossandón Leal

#3,196$3.58L J Koh

#8,740$79.22Ron Chironna

#5,539$0.42Jarel Threat

#9,729$13.55Winona Nelson

#15,738$0.23Wangjie Li

#13,323$0.26Airi Yoshihisa

#95$110.79

#8,136$0.26