you are walking in the night suddenly you got stabbed with an injection

You wake up in a prison like place and there are banners in the wall saying TT

MASTERMIND: welcome to the tower do not panic. The injection gave you powers. And there is 500,000 people that we also brought here. You each get 100 points. You can buy food, drinks and clothes with your points but if it hits 0 you die. And your powers are really random. Everyday you need to fight each other in the arena.