I just read the last post, and yes, Sliver Queen is my favorite Sliver, not Muscle Sliver! What color 5 color card is there? Personally, I love Muscle Slivers though. They are extremely efficient. They are at least a 2/2 for 2. If you can get more than that out quickly, they're better than Spectral Bears. Acidic Sliver also catches my eye. If you can make a way to make a lot of Slivers cheaply and quickly, you can easily pop them off on any target (I love that visual, like when the Space Marines shoot an Alien, and acid goes everywhere!). In a sense, this creature is slightly comparable to Mogg Fanatic.