This cube combines disguise, morph, cloak, and manifest. As a compromise between them, all face-down creatures have ward , so you don't need to specify which is which. (This idea came from a chaos draft with James) Do keep in mind though, manifest/cloak ARE slightly different than morph/disguise, because you can pay the mana cost of a cloaked/manifested creature to turn it face up. (I'd like to make a cube which uses only disguise and manifest so the distinction is more clear, but I'm waiting until we get more disguise cards to get too deep in that idea.)
In general there are two copies each of commons and uncommons, and one copy each of rares/mythics. I think I made some exceptions? Technically the 1-of Mana Tithe and Counterspell aren't exceptions though, since I clicked the Strixhaven Archive version.

High Alert
Disinformation Campaign
Sacrifice (artifacts and/or creatures)
Insidious Roots, Chalk Outline
Noncreature spells: Sprite Dragon, Levitating Statue, etc.

Disgorph -- Secret Plans, Goblin Maskmaker, Sumala Sentry, Tin Street Gossip

Dragons -- Kolaghan Warmonger, Dragon's Disciple, Draconic Muralists, Rith, Liberated Primeval, etc. Mostly confined to , but the megamorph dragon cycle is included as well.

There are three companions: Yorion, Sky Nomad, Gyruda, Doom of Depths, and Obosh, the Preypiercer

The "five mana rule" is mostly in place, I think it's only outright broken by Exalted Angel and Soul Collector