The starter decks above have everything you need to play the game: 60 cards, damage counters, a paper play mat (you dont NEED it, but its useful), and a lore tracker
Average the total mana spent to play it and unless it is under two we are looking pretty inefficient
Who wouldn't want Bahamut as the Ur Dragon
Memnarch In the days before color identity existed, the cards which could go into your deck were determined just by the colors in the mana cost of your commander
Even then, the deck can ramp back up in the blink of an eye
A color notorious for filling your hand with cards is Amethyst, with cards such as Finders Keepers, Friends On The Other Side, and Amethyst Chromicon, all cards that have made an appearance in several decks, allowing you to draw additional cards into your hand