Legends common. The ability that would eventually be called “vigilance” was very rare at first. Only Serra Angel had it in Alpha/Beta/Unlimited. Between Arabian Nights and Antiquities, only Yotian Soldier was printed. With Legends, however, four cards were printed involving vigilance. Showing just how wild the color pie was originally, those four cards feature a red enchantment, a green creature, a blue creature, and a BRG legend, putting the ability on all five colors!
