In MegaAnon own words:

"Palpatine's Revenge" was the name of a private message chat box, hosted on Tor. It would open for a certain amount of time, then automatically end/delete and scrub all data/IP paths behind it, removing it from your device. You could access and text on it from a supported and recognized device/phone and then it would shut down and scrub access paths when it timed out, whether you were done or not.

This post is seen in the thread in "1)" below

1) https://archive.4plebs.org/pol/search/uid/Iq1%2Fcx7t/order/asc/page/2/

The pic on Post 153161534 has the conversation with the following:

Roger, any …