Once per turn, during either player's turn: You can Tribute a Dinosaur-type Pendulum Monster you control
The main color thats allowed to counter spells is blue, but green has been allowed to put a stop to abilities here and there (especially in the old days)
I particularly like the idea of pairing it with damage dealing or amplifying commanders like Obosh, the PreypiercerObosh, the Preypiercer or Hidetsugu, Devouring ChaosHidetsugu, Devouring Chaos, as hitting double digits in damage dealt with a single effect can go a long way towards ending the game in your favor
Cards like Ant Queen and Jade Mage get much better, as do the Invokers
But a card doesn't need to have miracle for it to be worth playing, and that's especially true of the cards in Miracle Worker