@zolt4rFlanking is not in the rules (better!) but 8 creatures that sourround one could have adv? Maybe more than 3 creatures vs 1? As DM, you could certainly make such a rule, but you're going to have to roll more d20s than normal!
— Jeremy Crawford (@JeremyECrawford) September 11, 2014
Flanking is not in the rules but 8 creatures that sourround one could have advantage?
