The Omniscient Mortal

A man died. A system asked him if he wants to rebeirth after clicking yes for the first time he lived his second life full of torture. When he dies and gets asked for rebeirth he always clickes  'no' , but to no avail he reincarnates again. After a thousand 'no' he finally gave in and clicked yes. Reincarnated in a new world, he find this world with a concept similar to magic. Powers that dont abide by the laws of physics.

Most 'vi users' having unique power, what powers will 'vi' give him?