Politics in the Pub: Nine mountain schools. Myoe and the Mantra of Light, Ch. Each period had different types of Zen, some of which remained influential, while others vanished. Email or Phone Password Forgot account?
Look up zen in Wiktionary, the free dictionary. It may be the continuation of Shenxiu's "Northern School". After seeing this benfraserlee tweet, I did a search for every time Kevin Hart tweeted "fag," "homo," or "gay. Texts and Contexts in Zen Buddhism.
Various sutras were used for this even before the time of Hongren: