Stalker

The Stalker is an ominous, vengeful figure that infrequently appears during missions, armed with powerful weapons and abilities to hunt down Tenno who have his Death Mark. The Stalker is a sapient Warframe and is able to use ability powers belonging to various other Warframes. His arsenal is similar to that of the Tenno, utilizing a primary, secondary, and melee weapon. The Stalker's signature weapons are the bow Dread, the scythe Hate, and the throwing knives Despair