Herudra was able to become ONE OF the first legends on the EU server during Season 21 with this Warlock Zoo deck list. This is a fairly aggressive list, and takes advantage of the new LOE card, Dark Peddler. It also includes a card that is gaining popularity lately in Gormok the Impaler. It is looking more and more like the day of Zoo has returned!
Edit: He might have been first to legend, I can’t verify it yet!