I don't know his name, and can't even be bothered looking it up just now, but is this a cool guy to run with? I have models ripe for converting into the Prophet of Sotek, but I have no idea about his rules in the new book. Also he's on a Swarm base, right?
He seems like a fun little Lord to me. Tehenhauin can be mounted on Ancient Stegadon with EOTG, or unmounted. If unmounted, he has swarm base called Tide of Swarms, which grants him D6 S2 attacks on I1. He is also a level 3 Beast Wizard, and Immune to Poison. Maybe the most fun special rule he has is his ability to join Jungle Swarms, from which he gains Unbreakable and the Swarms lose the Unstable (Squish!) rule, which sounds pretty cool. I have yet to try this fellow.
Tehenhauin also lets your untis upgrade to have Poisoned ATaacks, so useful I don't use special characters, but I'm thinking of getting a model to convert into a Chief.
I've ordered him to lead my skink legion. Skinks are able to have poisoned attacks on their own as an upgrade but Tehenhauin gives them the option to have hatred(skaven). I'll be running him on foot myself.