Much like Vendilion Clique, theres a may clause tucked away here
Reaching for bear typal with cards like Wilson, Refined Grizzly and Ayula, Queen Among Bears makes perfect sense, but plenty of EDH staples like Mentor of the Meek and Manglehorn fall within this mothers protection
You can have some artifact hate like Brotherhood's End to remove them or use activated ability stoppers like Karn, the Great Creator or Yasharn, Implacable Earth
Their value and appeal lie squarely in their visual presentation, scarcity, and the prestige of owning these special versions
If you can get them directly from Wizards of the Coast when they come out, do that
Finding a Moltensteel Dragon, pumping it up at least 6 times, then turning it into Skithryx, the Blight Dragon for lethal Infect damage in the middle of combat is a classic, but there are plenty of other shenanigans if youre willing to explore the increasing pool of Dragons