Mars is such a vast place, of course, it's impossible to only have Tie Dan as the only beast residing here. Over the past five hundred years, quite a few demons have crossed the void to Yinghuo Heaven for the northwest wind.
Some came from Saturn Heaven, others from the Chaotic Star Sea, some were locally bred, and some emerged from who-knows-where corners. On average, they started at the Refining God and Returning Void Stage, presumably attracted by the resources of Yinghuo Heaven.
However, top predators like Brother Billa possess extremely strong territorial awareness. With Tie Dan, one might still exchange a few cordial words. But as for Yazi, it doesn't care about this or that, opting instead to swallow you whole in one gulp.
As for how much it needs to devour to become the ultimate crazy ferocious super giant demon... who knows? Do you count how many chickens you've eaten in your life?
