While this isnt really economic, and Im not 100% sure you can even trade the cards you get from the theme deck, the one theme deck worth getting is the Emboar one
Disney Lorcana Whispers in the Well: Spectacular Specters deck After the reprints in Fabled and the Set Rotation, there was a great appetite in the Disney Lorcana community for something new, and Ravensburger did not disappoint at all
More Magic: The Gathering Keyword articles How to Build an MTG Deck How to Build a Commander Deck in MTG MTG Evergreen Keywords List MTG Counter MTG Counters (markers) MTG Deathtouch MTG Defender MTG Double Strike MTG Enchant MTG Equip MTG Fear MTG Fight MTG First Strike MTG Flash MTG Flying MTG Haste MTG Hexproof MTG Indestructible MTG Intimidate MTG Lifelink MTG Menace MTG Protection MTG Prowess MTG Reach MTG Regenerate MTG Sacrifice MTG Shroud MTG Tap and Untap MTG Trample MTG Ward
While it used to be included in decks here and there in other formats, its mostly just an inclusion alongside blink commanders for its powerful ability
It is not just your commanders colors, it includes mana symbols on the card, too
Gelatinous Cube The closest analog to this card currently is Skyclave Apparition
