Aurochs | Magic: The Gathering
Formats Aurochs is Legal in
Official Oracle Text for Aurochs
Whenever Aurochs attacks, it gets +1/+0 until end of turn for each other attacking Aurochs.
Official Rulings for Aurochs
10/1/2009 : The ability counts the number of attacking creatures with the creature type Aurochs, not just those named Aurochs.