Grubby mentioned one of his reworks is the passive that generates beetles is every 3 hits on a hero spawns one, can have an army with stim lol
Arthas though sounds like hes going to be insanely broken.
Death coil will always heal arthas, and heal him for double the damage.. Then a talent at 13 makes it so itll heal him for like 1300 if hes low health
His tempest gradually adds an attack speed debuff like muradin, if you stand in it for 2 seconds you get rooted
His W can root everybody in its path so you could root with that, hit tempest to root them again... Successful W reduces the cooldown so you can root them again if they're still alive lol
Theres a bunch ot shit for him but he seems crazy if he has those lock down options