Its hard to interact with, it cant be countered, and it has built-in protection since any spell you play can bounce away any removal pointed at it
These days, the best Pokmon cards in the game tend to be more reliant on big damage to win, rather than applying conditions, but they're still an important part of the game, and - used strategically - can help you whittle down some of the highest HP Pokemon cards in your path
At 20 toughness you can untap your dorks, and then at 40 toughness you can force your foes to lose half of their life
Normally the best land or cycle hits #1 in my set review so something really strong must be hitting higher than this at the 11 spot
(Okay, it grafts the ability onto the enchanted creature, for those who want to get technical.) So, I hope those of you who have never had the joy of casting an Unstable Mutation finally get a chance