This is a powered cube, containing mostly the strongest cards I can think of.
It avoids two-card combos that win the game on the spot without being answerable at sorcery speed. (e.g. no Time Vault, no Kiki/Twin, no OG Emrakul)
It doesn't have any functionally identical cards. (e.g. Llanowar Elves is in, Elvish Mystic and Fyndhorn Elves are out)

Aggro is supported in red, white, and black. Storm is not supported.

All basics are snow-covered.

When someone goes 3-0 at a draft, they get to name a card to be added.
I can veto it and have them pick a different one if they want to add something that I think is wildly unplayable or doesn't fit.

In my IRL copy of this cube, all the cards are proxies. (the irl copy is also out of date since the start of covid)