#15 WotC themselves draw a distinction between 'design' and 'development', where design is making cards and development is adapting those cards to the limited / standard environment

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Once a character has been on the board for a turn, you can perform actions with them, either challenging an opponent's character or questing to gain lore
A two-mana 3/3 that leaves an equipment behind if the creature dies
The texturing is subtle enough that theyre playable in sanctioned Magic formats
Are cards in The Hobbit legal in Commander