theyre cheap and replaceable, especially the likes of Thought Scour, whose mill can help power Octavia out ahead of schedule
It has four loyalty, +2 to make a Food, +1 to answer a dork or artifact by removing their abilities and making a 3/3 Elk, also great for Commanders, and then -5 swap stuff, very easy with that starting loyalty and +2 ability
Honorable Mention: Khenra Charioteer This is really more of a "This is my Favorite Gruul Card Printed This Year" award rather than really a Top Ten, but take another look at how awesome this thing is
I wouldn't have an issue if you ran it against me in Pauper Commander since it's a one-of, but your milage may vary
helping to differentiate it from the many other dragons featured across the game