Theres also the timeshifted rarity
Removal interacts with mutate spells strangely If your opponent casts a creature for its mutate cost and you remove the creature it was mutating onto, the mutating creature spell doesn't fizzle
It sees play in decks that can take advantage of this situation decks commanded by planeswalkers, super friends, stax decks, or some kind of exalted decks
This card hasnt seen a lot of competitive play yet, but I wouldnt be surprised to see someone figure out a way to make it work
The deck usually revolves around defender creatures and their intrinsic synergies
In Commander his deck should contain plenty of red cards with high mana values and casting cost reduction, such as Blasphemous Act or Volcanic Salvo - you want cards that you can pitch to get a huge Blazing Shoal pump, but which you also have a good chance to cast normally