Every attack declaration sets off a chain of triggers, and connecting with a hit pays out even more.
Sets your commander and theme, then adds about 25 cards that fit plus 20 lands. You fill in the rest.
The top 40 of 309 cards that fit

#2,256$1.28Nicholas Gregory

#12,069$0.40Josu Hernaiz

#2,658$2.73Dan Hipp

#3,031$0.46Raoul Vitale

#13,150$0.24James Ryman

#7,532$0.38Suzanne Helmigh

#2,712$1.91

#6,434$2.68Kim Dingwall

#7,125$8.75InHyuk Lee

#16,545$14.25Myles Wohl

#1,127$5.77Chris Rahn

#5,678$8.40Johan Grenier

#6,382$0.33

#1,912$0.71Florian de Gesincourt

#2,646$2.18Brigitte Roka & Clifton Stommel

#13,638$0.15Ron Spears

#5,666$4.41Daarken

#8,904$0.27Narendra Bintara Adi

#8,934$0.32Andrey Kuzinskiy

#6,511$1.47Oleksandr Kozachenko

#7,280$0.38

#3,468$5.44Irvin Rodriguez

#3,044$37.27Phima

#8,670$0.38John Stanko

#14,183$0.27Winona Nelson

#7,837$0.35Cristi Balanescu

#6,755$0.68Nic Klein

#26,558$0.18Eric Deschamps

#11,612$0.41Daarken

#4,813$9.52Olena Richards

#9,841$0.33

#9,545$6.76

#234$2.81Daniel Ljunggren

#10,121$0.22Wayne England

#8,197$0.39

#7,795$0.28

#1,721$8.45Tiffany Turrill

#5,180$0.57Colin Boyer

#444$7.05Torstein Nordstrand

#2,585$13.83Jason Rainville