Yu-Gi-Oh!, Season 3: Enter the Shadow Realm

Yami-Marik:
You probably figured this out this, but my leech can attack instantly! You just lost five hundred of your life points, Pharaoh! And that's not all!!

(Yugi groans in pain as small parts of his body fade away into the shadows)

Yami-Yugi:
Yugi! What have you done, Marik?!

Yami-Marik:
When you lose life points, your friend will lose a piece of himself to the darkness, and the same rule applies to my former self. The shadows will claim an innocent soul, no matter who wins.

Yami-Yugi:
[enraged] You'll pay for what you've done!

Yami-Marik:
I disagree! It's you who shall pay! (thinking) He may not realize this, but when Yugi's body is consumed by the darkness, the Pharaoh will cease to exist in this world. For without a body, he's nothing but a wandering spirit.