Maybe the connection is a creature type, or the cards play well together, or they have some story element in common. And, unlike Draft Boosters, there is only one guaranteed uncommonwhile the other five cards all have a chance of being common or uncommon
Chandra Nalaar: A mono-red red deck wins/burn deck
Here's the list
I have three back imprinted cards in my possession: The top one is a Machop, and the other two are Red Cheeks Pikachus
If youre running a cheap commander with evasion or an easy way to gain double strike, and you really hate ramp decks, consider Destructive Urge
You need reference to paint a horse, a shockingly difficult animal, you need to understand light sources, shadow, and composition to make the simple task believable