This phrase is used when you have the high ground. Usually before saying that you have the high ground.
Obi Wan Kenobi: It's over Anakin,i have the high ground.
Anakin: You understimate my power
Obi Wan Kenobi: Don't try it.
The moment Anakin Skywalker made the worst decision in his fucking life.
It's over Anakin, I have the high ground.
YOU UNDERESTIMATE MY POWER
The scene in star wars where anakin is defeated by obi wan
*swoosh*
Anakin is floating on lava
Obi Wan: It’s over Anakin, I have the high ground!
Anakin angry: YOU UNDERESTIMATE MY POWER
*fight continues*
Obi Wan proceeds to leave Anakin in ashes
Darth Sidious (a.k.a. Palpatine) approaches
Emperor Palpatine: He’s still alive
Anakin is carried away