The Night

Prestiges 1-2: (works everywhere):

The darkness is one with you and you are one with the darkness

Night’s Knight - In dim light or darkness you cannot be detected or seen even with true sight, blind sense (no stealth roll ever required). Hostile creatures within 30 ft of you in dim light or darkness lose all resistances. Three times per day if you were to fail a save you may choose to succeed instead. As an action you become invisible until you go unconcious or use a bonus action to end this effect.
Night’s Execution - Your aura extends to 30 ft and now include slashing and bludgeoning. When a creature within your aura is hit with an attack you may have it take double the damage. Once you use this ability 3 times you cannot use it again until you take a short rest.

Watcher

Prestiges 3-4: (Works in native realm and realms where you have roots.):

Observseration leads to opportunity.

Watchers Vigilence - You can't be surprised and have advantage on attack rolls, ability checks, and saving throws. Additionally, other creatures have disadvantage on attack rolls against you. 
Watchers Prodigy - You gain blind sight. Allies within your aura can’t be surprised and can see any creature you see. As a bonus action you can see into and through solid matter for 1 minute. This vision has a radius of 30 feet. To you, solid objects within that radius appear transparent and don't prevent light from passing through them.

Executioner

Prestiges 5-6: (Works in certain parts of the native realm):

“You never want to get on her bad side”… “why?”… “you’ll be executed by him” -conversation

 
Tertia’s Exeuction - When you attempt to kill a target designated by the Goddess of Contracts the target takes damage you dealt to it at the begining of its turn. If this damage reduces the creature to 0. Its soul is sent to Mistra. This may cause the body to die.
Lover’s Executioner - When your wife takes damage or a condition from an effect you may take this damage or effect.

God of Executions

Prestiges 7-8: (works in domain or with explicit DM approval):

Those who hone their skills will find someone else who did it better.

Execute - You designate a target for execution. That target dies, if it does not immediately die, whatever is required to kill or otherwise remove the target from the domain happens within the next 3 rounds.