Your prompt this week:

Suppose it was possible to implant Z Crystals inside of humans, granting them superpowers. Your character is one of the first few that has survived the battery of physical and mental tests to become one of the first ones to undergo Z Infusion, as the process is called.

Which of the 18 type based Z Crystals does your character choose? What powers (besides a longer lifespan and dramatically increased defense) does this Z Crystal grant your character?