Any other exotic mana symbols and scenarios (such as cards with more than one printed cost) have their mana value calculated according to specific rules
Its possible, perhaps even likely, that certain Reserved List staples will spike several more times over the next couple of years
In fact, all of these cards are so good that every single one is in my Commander Cube (save for Tower of Fortunes and Loreseeker's Stone) as well as Abes Deck of Happiness and Joy
But it has its share of powerful creatures, especially because Commander encourages Wizards to print powerful legends
Overlord of the Boilerbilges Unimpressive as a 6-drop considering this list started out with Flametongue Kavu, so much of Overlord of the Boilerbilges power comes from its impending cost
Searching up cards like Daybreak Coronet, Spirit Mantle, and Ethereal Armor will make Zur more and more powerful, and he will quickly become a virtually untouchable enchanted monster capable of one-shotting other players with commander damage