The reason why devils fleed via teleportation was because they got shaken up from Janafae's attack and your dragon did not do anything aggressive this round of combat to activate his frightful presence (so it would had stacked). If you would had got Impervious Command the devils would had done nothing for 1 round while cowering in fear and then be shaken for 1 round.<br/><br/>Anyways your 60'ft blindsense does not detect nothing nor true seeing. I explained in my update IC post that both Zekolyn and Janafae were outside building when devils moved in and attacked matron.