The reprint quality is also exceptional
Heck, you could even use it to make casting some hydras easier, since you dont have to pump as much into the X cost of hydra creature spells
Even if you were to grab a monster-sized threat each turn, your opponents will still be able to use disruption, potentially leaving you wide-open to counterattack
Just remember that whichever mode you choose to cast becomes the mana value of the card on the stack and on the battlefield, unlike other, similar built-in cost reduction mechanics like Suspend or Miracle, s o a commander like Yuriko, the Tigers Shadow very much likes Prototype cards, while Vial Smasher the Fierce does not
(We just had to remember not to make a Wall of Bricks in the set.) While Limited Edition (Alpha) , destroying a Wall is a little bit narrow these days to build a whole card around