Hello whoever answer me, i recently came back on the game and i saw that i have those shiai token deprecated, do that mean i won't be to use them in the future or do i have a way to make them work again
Yes, old ST are now retired so they are not working, although you can sell and trade them. Currently new ST are being distributed which work in similar way.
Hi, we switched to new Shiai Tokens in May: you can see more info here and here.
Tokens that you have now are pretty much worthless. Some people collect them though so you may have luck selling some in market.