Prince of Demons.
Within ten feet.
"Bye!" Ælfric intoned, disappeared in a silvery mist, reappeared thirty feet further away from the Master of the Spiraling Depths in a similar mist, and ran even further away. One hand held Lucky Strike, his shortsword, while the other pulled off one of the six shining stars from his cloak's collar and threw it at the Sibilant Beast. In midair, the star split into seven blinding stars which all slammed forcefully into Demogorgon's simian chest!
Move: Run 35 more feet away for a total of 65 feet fled.
Action: Using the Robe of Stars to cast Magic Missile at 5th level.
Rolls
Magic Missile [lvl 5] - (1d4+1, 1d4+1, 1d4+1, 1d4+1, 1d4+1, 1d4+1, 1d4+1)
1d4+1 : (2) + 1 = 3
1d4+1 : (3) + 1 = 4
1d4+1 : (4) + 1 = 5
1d4+1 : (3) + 1 = 4
1d4+1 : (1) + 1 = 2
1d4+1 : (1) + 1 = 2
1d4+1 : (1) + 1 = 2