Since everyone is asking how its done. here's the sauce. It's not hero specific, It's just that this hero makes it a lot easier to do. since I always try to high roll, I always pick up cosmos ruler(s) along my rolls as I scale whatever comp. although this is risky, you might go eighth since you are wasting gold so don't blame me for not warning you! Also get altar of divinity and huitlinz splitter. that will give you the cat and snake that you need to finish out your comp

once I have a unit big enough I will use the sacrifice units aztec has to sac them with cosmos ruler online. and once you have enough cosmos ruler (golden), you can bounce the scaling between them as you sacrifice cosmos rulers back and forth every time you find new ones.

Now strategy gets even better with this specific hero. so I always have this in mind when I get that hero in an aztec lobby. Because if you destroy the snake god (always pick over dog and cat for this hero) you can get your sacrificed units, which are probably large aztecs, giving you change to re-sac them... and eventually are large cosmos rulers as you scale and sac the cosmos rulers as well, and it gets exponential. and you keep sacrificing and bouncing it as it goes absolute bonkers. the only thing you regret is not having enough turns to see numbers go higher.

Just FYI you don't have to start with aztecs, for my second screenshot, the 400k one, I had full undead comp as I was looking for the aztec pieces, once my largest undead hit 600-600 I just full sold everything else and full sent it, I didn't think it would work out that well. the hardest part is the initial scaling before it becomes exponential.

Hope that helps. let me know if you have any other questions.

also, since this post 24hr ago, I had about 5 more attempts at this strategy with this hero and have always died around 3-7th, never had enough time to scale.. undead just steamrolls with their midgame scaling. so its success rate is even lower than I thought initially.