This is my take on the two player shared-deck Battle Box format as featured in this video: https://youtu.be/_3K75KYFoAk

Used only cards in my collection and followed their advice regarding curve, higher power than toughness creatures, lots of interaction, and no card draw. Use my list as inspo to make one from your own collection, or refer to the video creator’s original list : https://cubecobra.com/cube/overview/casbox

Players draw from shared deck. Everything else separate (graveyards, etc) Start with a hand of 4 cards. We Lorcana mulligan for most fun. Bottom any number of cards and redraw up to four, once.

Each player has 10 lands in their command zone. 5 of each basic and 5 ally pair tap lands. Lands drops every turn, just a question of how you sequence.

20 life points. Good clean 5 color magic.