Ohsama Sentai King-Ohger ep44. "Proof of the Kings! The True Alliance of the Six Kingdoms"
Yanma: You climbed all the way up to King of Chikyu. How did you feel?
Racules: It was good.
Yanma: Huh?
Racules: Watching the sacrifice of numerous people, I was thrilled. When I saw you were about to die in front of my eyes, I couldn't help but laughed with excitement.
Yanma: Huh…? You went haywire?
Racules: That's right. I was drunk with power. Righteousness will drown out guilt, and turns a person into a monster with ease.
Yanma: There's no coming back from that.
Racules: Absolute power corrupts absolutely.
Yanma: You are the "best" example then. I get what you mean now. The top I'm aiming for… It's not that.