Can block an additional creature?

I'm currently working on a load of Khans cards (as many as I can get coded, pretty much), and so far I'm only kind of stuck on one of them, which is Brave the Sands.
1W Enchantment, Creatures you control have vigilance. Each creature you control can block an additional creature.
My issue is that I can't quite figure out the block additional creature part. There doesn't seem to be a characteristic for it, but I saw a function that said something like that in the function reference.
Is this possible to do?
1W Enchantment, Creatures you control have vigilance. Each creature you control can block an additional creature.
My issue is that I can't quite figure out the block additional creature part. There doesn't seem to be a characteristic for it, but I saw a function that said something like that in the function reference.
Is this possible to do?