
Slivers can't be blocked except by Slivers.
Shifting Sliver has 3 printings, first in Legions (2003). EDHREC ranks it #4,385 among Commander cards. It appears most in The First Sliver decks (15,787 on EDHREC). 1 public deck on TCG runs it. It has 2 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.