Core colors, for the record, will be determined by total number of decks in a given color with that theme under EDHrec
Mechanics arose from visualizing how two armies of creatures would battle each other, rather than creating mechanics and then fitting them into the Magic world. These two points of departure were later codified in design terms as top-down versus bottom-up
I've got you covered
You spend your Threads of Disloyalty to neutralize the opponent's Tarmogoyf
Colourless Pokmon are usually strong against other Colourless Dragon Pokmon
The most needed reprints are the ones that see play in older MTG formats, like Pioneer, Modern, Legacy, Vintage, but mainly EDH these days because, as the most popular format, Commander staples are the cards with the highest demand