At some point, once youve assembled a few of the key Slivers (particularly those that tap for mana), you really just want a critical mass of Slivers of any kind, and this is about as cheap as they get
Less Valuable Land Cycle: Typically, a rare land cycle helps with value, since rare lands are usually among the most valuable rares in the set
Like, honestly guys that is a level of gross I didnt think Wizards would go to
Not only have there been a limited number of cards with this mechanic, its a lengthy process to gain those ten counters
Mangaras legendary status also makes him a viable candidate as a Commander, regardless of whether you would want to build around it for added effect or simply just have a defensive Commander letting you draw cards on the regular
Expressive Iteration Take your pick Card draw spells are incredibly useful as long as they're well costed