make 10 items, all with the number on top right corner xD
write function in playeruseitem and make it so when you have a token in inv and another token in inv, to stack them, when one is consumed they both disappear and Token with 2 in the top right corner is given to u, now when the Token with 2 in top right corner is in inv and regular single Token is in inv and consumed, they both disappear and Token with 3 in top right corner is given to u, and so on and so on and so on
then once player does that all the way until you have Token 9 and single Token in inv and consume single Token to turn the Token 9 into Token 10, the Token 10 can be consumed for whatever i guess
i dont really play prod so idk what happens when u get 10 xD all i know is that they stack