Temporal Scoundrel

Whether you were exposed to a rift in time or stole an ancient tome containing secret arts you have learned to bend the streams of time to your advantage. Using youre powers you move througe time to take another chance at something you failed at,  learning from experiance and cheating fate when the odds are stacked against you.

Cheating Fate

Using temporal energy, you manipulate time and take a second chance at something you failed at. When you fail at a skill check, save, or weapon attack you can instead use a bonus action to reroll the dice with advantage. you must use the new roll. you can use this feature up to a number of times equal to youre proficiency bonus per long rest.

Chrono warping

When you hit an enemy with a sneak attack you cause the enemy to be wrapped in temporal energy. when hit the enemy creatures movement speed will be reduced by half, and they cant make opportunity attacks until the start of youre next turn. 

Boundless experiance.

You get two more proficiencies in skills of youre choice.

Counter strike

when an enemy creature hits you with an attack and before they roll damage you may use a bonus action and have the enemy reroll the attack dice, they must use the new roll. if they miss, you may make a sneak attack against the enemy creature. you may use this feature times equal to youre proficiency bonus per long rest.

ageless body

you no longer age, and you cannot be magically aged either.

rewrite destiny

you can use youre action to activate this feature, when activated you enter a state for up to 5 minutes in which if you die you return to where you started this effect and ignore any thing that happened to you. you can also end this effect early and activate the same effect. if the time runs out nothing happens, and the effect doesn't activate. This feature only affects you and not things that you do, like open a door, or anger a dragon. Any items you use stay used. you can use this feature once per long rest.