Tot confirmed yesterday that Harebourg was dead since the OVAs. All we got this season was his corpse.

Tot also said in a blog post yesterday that only 2 people died in S3, so Toxine might make a return.(and some stuff about Zera) tot-prod.blog/2017/12/04/le-tofu-devient-fou/

Also Wakfu/Dofus thread I guess

Link with everything: https://pastebin.com/Waq1WzVv