Being able to cast one spell and get another for free helps counteract a few of the problems with this deck, notably its somewhat lacking land base for such big spells, and the deal is made even sweeter with some of the enters-the-battlefield effects you could be unexpectedly triggering
Players commented that they enjoyed not having to worry as much about losing cards in their hand to Delinquent Duo or Trap Dustshoot , and that it felt like they could more easily overcome card advantage gained by Pot of Greed
The deck could immediately win upon resolving Splinter Twin on its Exarch, so even though Splinter Twin did nothing until the turn it won the game and extra copies in hand would be dead, it was worth it
In the last year, Red has grown its dorky enchantment game out of the niche strategies and into reasonable decklists
Sometimes, error cards can end up being highly sought after, as theres unlikely to be many of them in existence