The most important of these aspects is that it is cheap allowing you to fight back a bit with useful things to do earlier in the game against the tempo wars of the cheap agro decks
If youre not already familiar with the source, most of the references are totally lost, and the characters end up boiling down to dude with weapon making a pose. I felt this way with Fallout especially, since I wasnt very familiar with that franchise
The number of cards doesn't matter, as long as you get four or more card types
Oh like you're any better
The biggest concern with playing monocolor decks around a niche mechanic like energy is the limited pool of cards available, but Nissa really patches any holes on both sides of your gameplan
There is even a unique new gimmick involving Ditto, which will have certain Basic Pokmon cards feature a peelable top layer that will reveal the Transform Pokmon underneath