Its a great toolbox commander that can fetch wraths (Urza's Ruinous Blast, Ugin, the Spirit Dragon), finishers (Ghalta, Stampede Tyrant, Elesh Norn, Grand Cenobite) or silver-bullet legends (Arashi, the Sky Asunder, Yasharn, Implacable Earth)
How to Build a Commander Deck Using the free Commander Deck Building Template downloaded above, we will discuss each section in depth
The First Sliver gives all your other Slivers cascade, so you can cast two every turn
There's a wide range of creatures that are X/1, but I'm not sure this is a big enough deal to get too excited about
You also get to regenerate it for cheap to ensure it stays alive
I'm a bit sad that you can't recur other battles with it, but the reanimation of any other kind of permanent makes up for it