Auriok Siege Sled

Artifact Creature - Juggernaut 3/5, 6 (6)
{1}: Target artifact creature blocks Auriok Siege Sled this turn if able.
{1}: Target artifact creature can't block Auriok Siege Sled this turn.¹
Everything in its path is either pushed aside or ground under.
Illus. Jim Murray

Gatherer Card Rulings [Nov 2009]

• 12/1/2004: Remember that  an effect that says you "can't" do something overrides an effect that says you can or must do something. If you activate both of Auriok Siege Sled's abilities on the same creature, that creature can't block Auriok Siege Sled this turn.

Format Legality	Legal in Vintage, Legacy, Extended Banned in Standard
Printings (1/8)	Darksteel (Uncommon)