This massive enemy has characteristics that resemble that of a Beamos. When it sees Link in the distance, its eye lights up and it shoots a powerful laser beam toward him. These beams cause massive destruction and cause objects in the distance to light on fire.
Unlike most Beamos, this creature is not stationary and has the ability to move very rapidly in pursuit of Link. The enemy has six massive legs. While it may not have exactly eight legs to fit the traditional definition of an arachnid, the enemy does resemble similar spider-like enemies that have appeared in the Zelda Series before.
Like Beamos that have appeared in modern Zelda games including Skyward Sword, Link is able to defeat this massive creature by shooting its eye with the use of a Bow and Arrow. Ancient Arrows in particular are very powerful against these enemies, since one successful shot to the eye will take it down instantly. The Master Sword is also a wise choice, not only for the fact that its power is elevated to 60 when near a Guardian, but also due to Link being able to destroy the creature's legs, immobilizing it.
Other strategies that can be used to defeat Guardians include utilizing the Perfect Guard ability, where Link can deflect the Guardian's laser with his shield at the right moment to deal significant damage to the enemy (this method can be done with any shield, regardless of the durability or defense value). It takes three successful parries to take down a Guardian Stalker. Link should be wary though, since if he fails to Perfect Guard, the laser may still hit him and cause devastating damage, or it may hit his shield and can possibly destroy the shield with a single shot.