It'll either give you more creatures, burn all your opponents, draw you cards, or put +1/+1 counters on all of your artifact creatures (which most of the creatures in the deck are)
Casting Cost: Card Text: Red creatures you control get +1/+0
After all, if you're going to make a huge Hydra that folks are probably going to have to remove at some point, you'd better at least protect it
But tapping four elves is a bigger cost than we often want to pay
Rayquaza's price flew up into the stratosphere, jumping from roughly $250 into the $500 range as it performed an incredibly unexpected double-up
According to MTG Goldfish, the Judge Promo copies have gone from $65 to $70, while more recent printings like Foundations or Ravnica Remastered are each up a couple of dollars