Though I will provide criteria to answer this question later, it goes without saying that a card must be first and foremost balanced
The rarity of the Top 10 cards means only serious collectors are likely to have them in their collection
One final thing to note is that if you use any of these legends as your commander (or Otrimi, the Ever-Playful, a sixth legendary mutator printed in the upcoming Commander precons), then any mutated creature with the commander on top will deal commander damage
[8] A rank star is a yellow 5-point star with a black circle surrounding it
This turns 3 mana into 4, 4 into 6, 5 into 8, and so on, allowing you to play expensive blue and colorless spells with ease
During one particularly gruelling match using the Theros: Beyond Death set on Magic: The Gathering Arena, I was shocked when my White-based opponent placed the Shatter the Sky spell down