高(こう)架(か)下(した)の邪(じゃ)術(じゅつ)師(し)

Deathtouch

When Underbridge Warlock enters, you get a one−time boon with "At the beginning of your end step, if three or more creatures died this turn, each opponent loses 5 life and you gain 5 life."

At the beginning of your end step, if you have a boon, you mill three cards, draw a card, and lose 2 life.