If you hold more grudges than Arya Stark, there’s an easy way to get back at your Game of Thrones-loving enemies: A web app called Spoiled.io will let you anonymously text show spoilers to their cell phone.

The app charges $0.99 per target, sends spoiler-heavy texts minutes after the latest episode airs, and, according to The Guardian, was inspired by the story of a woman who took vengeance on a cheating ex-boyfriend by messaging him Game of Thrones spoilers each week. Unfortunately, it only runs until the end of the season, which means there’s only a few episodes left to wreak your TV havoc. The silver lining for the truly vengeful is that ruining the series finale is possibly the most evil thing you could do to a Game of Thrones fanatic.

In true Westerosi style, the site will also send you the text responses of Spoiled.io victims, making their moment of retribution public. That might sound pretty cruel, but it’s still a milder punishment than the walk of atonement.

Updated for 2019.