Another card that hasn't had its time to shine but could be powerful in this sort of deck is Voldaren Pariah
Shivan Dragon and certain Tempest Medallions being the cards affected, it raises the question, why
With this in mind, timing this card right will be vital, however, you dont want to leave it too late
In a starting hand I think you want to be looking for an early token producer like Hordeling OutburstHordeling Outburst or Midnight HauntingMidnight Haunting so you have something to attack with when you drop your commander
Things like value, tempo, interaction, bluffing, and card advantage all have serious impacts determined by the players and their choices throughout the game
(It's an artifact with ", Sacrifice this token: Add one mana of any color.") Other creatures you control enter with an additional +1/+1 counter on them for each mana from a Treasure spent to cast them