Ox Cart

When this card enters the Battlefield, equip it to two target Ox you control.
These Ox can only attack and block as one, and both die if either one
Would die. Both Ox have double strike, and Lifelink. They deal damage equal to
Their toughness.When these Ox die, destroy Ox Cart, and search your
Library for two basic Plains, and put them into the battlefield tapped.