Has risen up
He is divided.
He cannot stand.
But his end
καὶ εἰ ὁ Σατανᾶς ἀνέστη ἐφ’ ἑαυτὸν καὶ ἐμερίσθη, οὐ δύναται στῆναι ἀλλὰ τέλος ἔχει.
There are similar statements to this in Matthew, chapter 12:26, and Luke, chapter 11:18. Mark said that if Satan has risen up against himself (καὶ εἰ ὁ Σατανᾶς ἀνέστη ἐφ’ ἑαυτὸν), he was divided (καὶ ἐμερίσθη). He would not be able to last or stand (οὐ δύναται στῆναι) because the end of Satan has come (ἀλλὰ τέλος ἔχει). Mark did not have the argument about how their own sons or other exorcists were able to cast out demons. All in all, this was a very strong argument against Jesus and Beelzebul working together.