Index: src/map/battle.c
===================================================================
--- src/map/battle.c    (revision 14116)
+++ src/map/battle.c    (working copy)
@@ -269,9 +269,11 @@
 int battle_calc_damage(struct block_list *src,struct block_list *bl,struct Damage *d,int damage,int skill_num,int skill_lv)
 {
    struct map_session_data *sd = NULL;
+   struct map_session_data *srcsd = NULL;
    struct status_change *sc;
    struct status_change_entry *sce;
    int div_ = d->div_, flag = d->flag;
+   char atcmd_output[50];
 
    nullpo_retr(0, bl);
 
@@ -282,6 +284,17 @@
 
    if (bl->type == BL_PC) {
        sd=(struct map_session_data *)bl;
+       srcsd=(struct map_session_data *)src;
+
+   if(flag&BF_MAGIC && srcsd->special_state.anti_no_magic_damage && sd->special_state.no_magic_damage){ //Anti-GTB by [Rad]
+       if(sd->special_state.no_magic_damage > srcsd->special_state.anti_no_magic_damage)
+       sd->special_state.no_magic_damage = sd->special_state.no_magic_damage - srcsd->special_state.anti_no_magic_damage;
+       if(sd->special_state.no_magic_damage < srcsd->special_state.anti_no_magic_damage)
+       sd->special_state.no_magic_damage = 0;
+       sprintf(atcmd_output, "GTB effect reduced to %d, due to an anti-gtb used by the attacker", sd->special_state.no_magic_damage); // Jumped to %s
+       clif_displaymessage(sd->fd, atcmd_output);
+
+       }
        //Special no damage states
        if(flag&BF_WEAPON && sd->special_state.no_weapon_damage)
            damage -= damage*sd->special_state.no_weapon_damage/100;
@@ -529,6 +542,8 @@
            mobskill_event((TBL_MOB*)bl,src,gettick(),MSC_SKILLUSED|(skill_num<<16));
    }
 
+   if(sd) status_calc_pc(sd,0); //calculate to return bNoMagicDamage to original
+
    return damage;
 }
 
Index: src/map/map.h
===================================================================
--- src/map/map.h   (revision 14116)
+++ src/map/map.h   (working copy)
@@ -327,7 +327,8 @@
    SP_SP_GAIN_RACE, SP_SUBRACE2, SP_UNBREAKABLE_SHOES, // 2031-2033
    SP_UNSTRIPABLE_WEAPON,SP_UNSTRIPABLE_ARMOR,SP_UNSTRIPABLE_HELM,SP_UNSTRIPABLE_SHIELD,  // 2034-2037
    SP_INTRAVISION, SP_ADD_MONSTER_DROP_ITEMGROUP, SP_SP_LOSS_RATE, // 2038-2040
-   SP_ADD_SKILL_BLOW, SP_SP_VANISH_RATE, SP_MAGIC_SP_GAIN_VALUE, SP_MAGIC_HP_GAIN_VALUE //2041-2044
+   SP_ADD_SKILL_BLOW, SP_SP_VANISH_RATE, SP_MAGIC_SP_GAIN_VALUE, SP_MAGIC_HP_GAIN_VALUE, //2041-2044
+   SP_ANTI_NO_MAGIC_DAMAGE // counter GTB mod [Rad]
 };
 
 enum _look {
Index: src/map/pc.c
===================================================================
--- src/map/pc.c    (revision 14116)
+++ src/map/pc.c    (working copy)
@@ -2283,6 +2283,12 @@
        if(sd->state.lr_flag != 2)
            sd->add_heal2_rate += val;
        break;
+   case SP_ANTI_NO_MAGIC_DAMAGE:
+       if(sd->state.lr_flag == 2)
+       break;
+       val+= sd->special_state.anti_no_magic_damage;
+       sd->special_state.anti_no_magic_damage = cap_value(val,0,100);
+       break;
    default:
        ShowWarning("pc_bonus: unknown type %d %d !\n",type,val);
        break;
Index: src/map/pc.h
===================================================================
--- src/map/pc.h    (revision 14116)
+++ src/map/pc.h    (working copy)
@@ -133,7 +133,7 @@
        unsigned short autobonus;
    } state;
    struct {
-       unsigned char no_weapon_damage, no_magic_damage, no_misc_damage;
+       unsigned char no_weapon_damage, no_magic_damage, no_misc_damage, anti_no_magic_damage;
        unsigned restart_full_recover : 1;
        unsigned no_castcancel : 1;
        unsigned no_castcancel2 : 1;