## As for the horn that was broken ... four others arose ##

"Where the large horn was broken off, four others arose"

## but not with his great power ##

"but not with the great power that the king represented by the long horn had"

## shall have reached their limit ##

"have reached their full" or "have run their course"

## grim-faced ##

This means someone who looks defiant, or like he will refuse to obey.