mtg angel commander precon Was It Worth It To Buy The Angels Secret Lair Deck? March of the Machine: New

Changelings are interesting because treefolk are usually expensive, so cards like Masked Vandal and Chameleon Colossus lower the curve and add versatility

Controlling a player doesn't allow you to look at that player's sideboard

Not the most powerful or well supported of Magics creature types, but theres lots of individual bears that can fit your needs in other deck themes

Changing creature types on vehicles is intriguing, but Im not sure thats worth pursuing

Finally, the deck aims to put tons of cards into your graveyard, and then take advantage of this (for example with Izoni, Thousand-Eyed, Golgari Grave-Troll, Jarad, Golgari Litch Lord, etc)