Cast huge creatures and pump them with your extra mana. Trample makes sure the damage still gets through.
Sets your commander and theme, then adds about 25 cards that fit plus 20 lands. You fill in the rest.
The top 40 of 674 cards that fit

#21,096$5.33Victor Adame Minguez

#643$2.96Paul Mafayon

#6,710$4.86Kev Walker

#528$1.03Daniel Landerman

#459$1.02Johann Bodin

#2,515$6.16Kevin Sidharta

#2,256$1.28Nicholas Gregory

#10,559$0.13Zack Stella

#1,773$36.88Loïc Canavaggia

#3,966$0.14Lars Grant-West

#1,127$5.77Chris Rahn

#1,189$12.13Steve Ellis

#5,178$3.25Chase Stone

#1,862$0.25Ryan Yee

#2,177$0.35Deruchenko Alexander

#1,591$16.75Lucas Graciano

#20,487$0.34Antonio José Manzanedo

#1,582$34.03

#7,889$0.35Jaime Jones

#20,085$0.26

#5,860$0.44Brent Hollowell

#13,765$0.47

#1,637$10.67Mónica Robles Corzo

#5,001$9.46Adam Paquette

#3,409$15.09Christopher Moeller

#3,136$2.80Jessica Fong

#2,428$1.31CatDirty

#2,059$1.84D. Alexander Gregory

#1,707$0.19Jeff Miracola

#3,619$0.39

#12,932$0.19Tyler Walpole

#15,584$0.95Yongjae Choi

#299$23.04Chris Rahn

#2,265$2.89Michal Ivan

#19,920$0.12Kev Walker

UnrankedCristi Balanescu

#2,646$2.18Ryota Murayama

#6,905$2.83Mathias Kollros

#2,027$0.16Nils Hamm

#10,302$0.28Zoltan Boros