243a0200_ne_Arena_Strategy___Blue_is_Me__Advantages
[Name] Immortal [Disadvantages] Firing rate slow. Other immortals, brutalisks, and cracklings can kill it easily. [Advantages] 
Does massive damage against most units, especially armored and mechanical. Can attack ground and air. Can use hardened shield to take less damage.
Starcraft 2: Marine Arena Strategy | Blue is Me
Advantages