Pause to screen: You can put the entire world on pause at will, but your body will also freeze along with others, with only your mind remaining active to think and resume back time.
Respawn on death: Upon dying against your will, you will be presented with an option of respawning back to your bed or any familiar safespace, and an option to confirm your death.
Rapid health regeneration: Your body will quickly heal after sudden injury to full health when left undamaged for a minute.
Built in HUD: You will be able to view your body's stats directly within your vision, like meters/numbers for any type of body metric, your inventory, a minimap and reminders/alerts.
Skill Tree: You level up on your birthdays and acquire a skill point to spend on various types of stats and powers of your choice.
Fast travel: You can instantly teleport to your personally known safe places, no matter how far away they are, except in situations where you are busy and not allowed to leave the vicinity. (By courtesy of ChrisFhey)
Skill Check: While doing an action, you will be able to observe if you have the necessary stats required to perform that action successfully. (By courtesy of nieceandtows)
Note: Save/Load has been intentionally left out since it is essentially more OP than all of the other options listed here.
Edit: changed title from 'superpower' to 'game feature' + misspellings + 6th and 7th point