Thread:Loconator3000/@comment-5688420-20200720123252/@comment-5688420-20200725060816

When your life points and your deck are directly connected, and so damage you take causes you to mill cards from your deck. More info here.

https://youtu.be/HuAkw707oOA

Kessenju doesn't use lifedecking, but the game does have mill decks.