switch (wrapper.getTier()) {
                    case 2: {
                        exp = exp * 1.2;
                        break;
                    }
                    case 3: {
                        exp = exp * 1.5;
                        break;
                    }
                    case 4: {
                        exp = exp * 2;
                        break;
                    }
                    case 5: {
                        exp = exp * 2.5;
                        break;
                    }
                }