ROBERT FITZGERALD DIGGS—better known as RZA—helped build the hip-hop empire known as Wu-Tang Clan from gritty beats, kung fu flicks, and eight other minds that spit razor-sharp poetic philosophies.

I survived Shaolin Kung fu training for 24 hours. I along with several other YouTubers were invited to spend a day with a Shaolin monk. I’ve always been afraid of Shaolin training but decided to go ...