Mark of Dis

The only devils that survive for long in the labyrinthine streets of Dis are those with Dispater's preparedness and unflagging paranoia. Having been touched or influenced by Dispater, when you move during your turn you can do so without triggering opportunity attacks from a number of enemies equal to half your proficiency bonus rounded up. In addition, as a reaction, you can choose to gain a +4 bonus to your AC or on a single saving throw you make before the start of your next turn. This bonus applies to one or the other, but not both.