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Yes, the Japanese are quite amusing. I would like to see them as one of the "joke factions".
My sword, my trusted ally, unphased by my aspect.

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That's even cooler! The Japanese have mutated! Awesome!
Today, producer Erwan Le Breton wrote in the comments to the Necropolis that a new artwork will be released soon, and it will be the last creature of the Necropolis (he says they haven't shown you the last unit of the Necropolis yet). We're waiting for the spider queen... He also wrote a comment about Haven (they will show 2 units soon). In general, he says that tomorrow we will see a new artwork. I hope he's not lying. In that case, since he didn't write anything in the comments to Inferno, tomorrow they will either release the last unit of the Necropolis or one of the 2 remaining units of Haven.
That's good. I wish it was a spider unit. But I still think that tomorrow they will only show this unit, and on Friday they will show the last units of Haven.
the most likely option.
I think the spider is still the champion (they probably saved it for last)
And for now, it's like this (I won't break down Haven, as the last unit is unknown):()
Necropolis
base - Skeletons, Ghouls, Ghosts
elite - Liches, Vampires, Lamassu
Champion - Spider
Inferno
base - Maniacs, hounds, succubi (succubi and tormentors can be swapped)
elite - tormentors, jaguars, pit lords
Champion - Archdemon (I'm not sure, but there was information from a closed forum on the Community)
Sorry for the confusion guys. The Pit Lord IS the strongest unit for the Inferno. You can call that a confirmation if you like. I got the order mixed up for some unknown reason, hence my earlier post. My apologies.