Planar Influence: Evil, Carceri

Your time channeling cosmic forces has caused your body to be tuned to the energies of a single Outer Plane. Choose an Outer Plane that matches at least one alignment with your Scion of the Outer Planes feat. 
(These feats are based on Planar Influences found in Morte’s Planar Parade. As such, some have been edited to better match being used by PCs)

Creatures influenced by Carceri appear as if they’d been imprisoned underground for a long period; their hair is matted, their nails or claws are long and dirty, and they have marks as if they were bound by chains or rope. You also gain one or more of following traits of the DMs choice:

Burden of Hopelessness. An invisible, magical aura of hopelessness surrounds you. Any other creature that starts its turn within 5 feet of you has its speed reduced by 10 feet until it is reduced to 0 hit points, regains hit points, or gains temporary hit points. This reduction never exceeds 10 feet. This effect can be dismissed or reactivated as an action.

Torturous Teleport. An invisible, magic-disrupting aura surrounds you. Any creature that teleports into or out of a space within 20 feet of you must make a DC 15 Constitution saving throw, taking 16 (3d10) force damage on a failed save, or half as much damage on a successful one. This effect can be dismissed or reactivated as an action.

In addition, if you activate any one of these features and your alignment is not Neutral Evil or Chaotic Evil, make a DC 5 Wisdom saving throw. On a failure, roll an d20. An odd value changes your alignment to Neutral Evil, an even value changes it to Chaotic Evil. A short or long rest or a dispel evil and good spell restores your original alignment.