it's not easy enouve to win, but when you finally win, you see that monsters and rogues are not 2 families.
thank you DB for giving us this fcked up event with very clear description, dwarfs and beasts are families but either reptiles or rogues are not. i could smell it of course. type all families in the description, it fits.
i won a pvp battle after 5 tries with rocky/viperia/koros and mangle and no victory in the quest 2 families win.
Being able to sort heroes by class or family would have helped, oh wait......