
All Slivers have "Sacrifice this permanent: Add {B}{B}."
Basal Sliver has 2 printings, first in Time Spiral (2006). EDHREC ranks it #9,042 among Commander cards. It appears most in The First Sliver decks (4,693 on EDHREC). It has 2 official rulings.
Deck counts from EDHREC.
Cards that show up in the same decks on EDHREC.