Jackal Familiar | Magic: The Gathering
Formats Jackal Familiar is Legal in
Official Oracle Text for Jackal Familiar
—Taivang, barbarian warlord
Official Rulings for Jackal Familiar
10/1/2009 : "Can't block alone" has a similar meaning. Note that the other blocker(s) doesn't have to block the same attacker as Jackal Familiar.
10/1/2009 : Once Jackal Familiar has been legally declared as an attacking or blocking creature, how many other creatures it's attacking or blocking with no longer matters. For example, if Jackal Familiar and Canyon Minotaur both attack, then Canyon Minotaur leaves the battlefield, Jackal Familiar continues to attack even though it's now attacking alone.
10/1/2009 : An effect may put Jackal Familiar onto the battlefield attacking even if no other creatures are attacking. That's because it wasn't declared as an attacker in this case. Similarly, an effect may put Jackal Familiar onto the battlefield blocking even if no other creatures are blocking.