Text (IN+errata): 7/4, First Strike, Protection from Legendary Creatures. ; {B}{B},{Tap}: Destroy target legendary creature. It can't be regenerated. [Oracle 2004/10/01]
The protection ability works just like Protection from Color (see Rule 702.14) but against legendary creatures. [Invasion FAQ 2000/10/03] This basically means that this card cannot be blocked by a legendary creature and that all damage that would be dealt to it by legendary creatures is prevented. Also, targeted abilities of legendary creatures cannot target this card. The other features of Protection also apply in some rare circumstances. [D'Angelo 2000/10/14]
The destroy ability only works on legendary creatures, not on other legendary cards. [Invasion FAQ 2000/10/03]
Note - This card was creature type "Legend" until Oracle 2004/10/01, when it became no type. Then with Oracle 2007/10/01 it became "Zombie". Then with Oracle 2008/01/01 it became "Horror".