Dragons are the coolest creatures, and this tribal deck combines the best of them under the banner of Commander The Ur-Dragon, which makes them all cheaper from the command zone
Card Type or Subtype: The key to this connection is to have all the cards share a type or subtype
The Arena economy is so punishing that I just can't, in good conscience, recommend that you spend your mythic wildcards on Chatterfang, Squirrel General on the off-chance that Squirrels end up being somewhat playable
The Japanese set is reported to have 204 cards instead of the 216 the English set has
While there should always be options for this, it basically allows you to break the rule of one card in your Commander deck, and because its an Artifact, it can go in any deck
Unless you're way cooler than we are (not a high bar, we admit), you don't own a blacklight