Since he didn't found any traces of beastman territory he could only put his attention to monster civilization, beast are known to make their own territory as this world would also bless them.
Knowing this he summoned his clones and have them scatter everywhere, he would also search for any remnant of any form of civilization.
Because he doesn't want to truly destroy the balance of the place, he didn't immediately start killing and hoarding all beasts he encountered.
Now that he had enough food for the scarabs to continue their cruel training he wasn't worried that he would halt their advancement.
The cruel training continue and because of this the number of scarabs didn't increase that great, most scarabs were devoured by other scarabs but because of their cruel training they started to transform into different batches of scarabs.