C++ :: Traversing Linked List (Minions)

I have been trying to create a linked list of "Minions" where each has x coordinates, y coordinates, wp (weapon power), and a pointer to next minion.

the code:

#include<cstddef>
#include<iostream>
using namespace std;
struct minion{
int x;
int y;
int wp;
minion* next;

[Code] ....

Problem is: I made 3 for loops in main, first one to display the current weapon power which expected to output 10 10 10 (initial set weapon powers), 2nd for loop increases their weapon power (for whatever reason, a level up or something), third loop should display the new increased weapon power.

BUT, what i get is 10 and below it 30. looks like min4's wp only increased. There must be something wrong i am doing while i try to loop through my linked list and i cant figure it out...