Having to only spend one mana to have a card that puts you two mana ahead for the rest of the game until removed is absurd
But there were design directives Verhey held to make sure that players would recognize staples of the series even if they hadnt played every game
Legendary Creature - Human Advisor Riders of the Mark Affinity for Humans (This spell costs less to cast for each Human you control.) Trample, haste At the beginning of your end step, if this creature attacked this turn, return it to its owner's hand
As with any Commander game, you want to ensure your starting mana is right for you to cast a few spells
Avoid overpriced removal, one-shot life gain, expensive combat tricks, and big spells that do not draw, remove, create tokens, recur cards, tutor, or win