Lets face it, unique gameplay is what matters in Commander, and its why we keep some decks built and deconstruct others
Unfortunately Starfield looks for the card's mana value and with both doors unlocked, the mana value of the enchantment is 0 and so it'd die and go to the graveyard because it has 0 toughness
Slumbering Dragon ( PF, ETB ) - At just 1 mana (no cost-reducation), this gives players a reason not to attack you
Illustrated by rk post Standard Not Legal Alchemy Not Legal Pioneer Not Legal Historic Not Legal Modern Not Legal Brawl Not Legal Legacy Not Legal Comp
Beyond this, the Pioneer format started at Return to Ravnica and spanned through to the present day's sets
Many Alpha cards are highly valuable, such as Alpha Dual Lands