Fix drop yang

find in char_battle.cpp:

else if (1 == number(1, iGold10DropPct))
    {
        //
        // µ· ĆřĹş˝Ä µĺ·Ó
        //
        for (int i = 0; i < 10; ++i)
        {
            int iGold = number(GetMobTable().dwGoldMin, GetMobTable().dwGoldMax);
            iGold = iGold * CHARACTER_MANAGER::instance().GetMobGoldAmountRate(pkAttacker) / 100;
            iGold *= iGoldMultipler;

            if (iGold == 0)
            {
                continue;
            }

            // NOTE: µ· ĆřĹşŔş Á¦ 3ŔÇ ĽŐ Ăł¸®¸¦ ÇĎÁö ľĘŔ˝
            if ((item = ITEM_MANAGER::instance().CreateItem(1, iGold)))
            {
                pos.x = GetX() + (number(-7, 7) * 20);
                pos.y = GetY() + (number(-7, 7) * 20);

                item->AddToGround(GetMapIndex(), pos);
                item->StartDestroyEvent();

                iTotalGold += iGold; // Total gold
            }
        }
    }
else if (1 == number(1, iGold10DropPct))
    {
        //
        // µ· ĆřĹş˝Ä µĺ·Ó
        //
        for (int i = 0; i < 10; ++i)
        {
            int iGold = number(GetMobTable().dwGoldMin, GetMobTable().dwGoldMax);
            iGold = iGold * CHARACTER_MANAGER::instance().GetMobGoldAmountRate(pkAttacker) / 100;
            iGold *= iGoldMultipler;

            if (iGold == 0)
            {
                continue;
            }

            // NOTE: µ· ĆřĹşŔş Á¦ 3ŔÇ ĽŐ Ăł¸®¸¦ ÇĎÁö ľĘŔ˝
            if ((item = ITEM_MANAGER::instance().CreateItem(1, iGold)))
            {
                pos.x = GetX() + (number(-7, 7) * 20);
                pos.y = GetY() + (number(-7, 7) * 20);

                item->AddToGround(GetMapIndex(), pos);
                item->StartDestroyEvent();

                iTotalGold += iGold; // Total gold
            }
        }
    }
Try to remove whole else if and check if it's working (save it somewhere maybe in case it wouldn't work).

@EDIT:

I didn't notice you also want to remove it from bosses. I have no time right now to adjust it but you can try it on your own. You have everything around this else if I gave you higher.

@EDIT2:

char_battle.cpp on the beggining add

#include "../../common/service.h"
#include "../../common/service.h"
common/service.h on the end add

#define DISABLE_YANG_BOMB
#define DISABLE_YANG_BOMB
char_battle.cpp change in Reward()

    if (GetMobRank() >= MOB_RANK_BOSS && !IsStone() && GetMobTable().dwGoldMax != 0)
    {
        if (1 == number(1, iGold10DropPct))
            iGoldMultipler *= 10; // 1% Č®·ü·Î µ· 10ąč

        int iSplitCount = number(25, 35);

        for (int i = 0; i < iSplitCount; ++i)
        {
            int iGold = number(GetMobTable().dwGoldMin, GetMobTable().dwGoldMax) / iSplitCount;
            if (test_server)
                sys_log(0, "iGold %d", iGold);
            iGold = iGold * CHARACTER_MANAGER::instance().GetMobGoldAmountRate(pkAttacker) / 100;
            iGold *= iGoldMultipler;

            if (iGold == 0)
            {
                continue ;
            }

            if (test_server)
            {
                sys_log(0, "Drop Moeny MobGoldAmountRate %d %d", CHARACTER_MANAGER::instance().GetMobGoldAmountRate(pkAttacker), iGoldMultipler);
                sys_log(0, "Drop Money gold %d GoldMin %d GoldMax %d", iGold, GetMobTable().dwGoldMax, GetMobTable().dwGoldMax);
            }

            // NOTE: µ· ĆřĹşŔş Á¦ 3ŔÇ ĽŐ Ăł¸®¸¦ ÇĎÁö ľĘŔ
#ifdef DISABLE_YANG_BOMB
            pkAttacker->GiveGold(iGold / iSplitCount);
            iTotalGold += iGold;
#else
            if ((item = ITEM_MANAGER::instance().CreateItem(1, iGold)))
            {
                pos.x = GetX() + ((number(-14, 14) + number(-14, 14)) * 23);
                pos.y = GetY() + ((number(-14, 14) + number(-14, 14)) * 23);

                item->AddToGround(GetMapIndex(), pos);
                item->StartDestroyEvent();

                iTotalGold += iGold; // Total gold
            }
#endif
        }
    }
    // 1% Č®·ü·Î µ·Ŕ» 10°ł ¶łľî ¶ß¸°´Ů. (10ąč µĺ·ÓŔÓ
#ifndef DISABLE_YANG_BOMB
    else if (1 == number(1, iGold10DropPct))
    {
        //
        // µ· ĆřĹş˝Ä µĺ·Ó
        //
        for (int i = 0; i < 10; ++i)
        {
            int iGold = number(GetMobTable().dwGoldMin, GetMobTable().dwGoldMax);
            iGold = iGold * CHARACTER_MANAGER::instance().GetMobGoldAmountRate(pkAttacker) / 100;
            iGold *= iGoldMultipler;

            if (iGold == 0)
            {
                continue;
            }

            // NOTE: µ· ĆřĹşŔş Á¦ 3ŔÇ ĽŐ Ăł¸®¸¦ ÇĎÁö ľĘŔ˝
            if ((item = ITEM_MANAGER::instance().CreateItem(1, iGold)))
            {
                pos.x = GetX() + (number(-7, 7) * 20);
                pos.y = GetY() + (number(-7, 7) * 20);

                item->AddToGround(GetMapIndex(), pos);
                item->StartDestroyEvent();

                iTotalGold += iGold; // Total gold
            }
        }
    }
#endif
    else
    {
        //
        // ŔĎąÝŔűŔÎ ąć˝ÄŔÇ µ· µĺ·Ó
        //
        int iGold = number(GetMobTable().dwGoldMin, GetMobTable().dwGoldMax);
        iGold = iGold * CHARACTER_MANAGER::instance().GetMobGoldAmountRate(pkAttacker) / 100;
        iGold *= iGoldMultipler;

        int iSplitCount;

        if (iGold >= 3 && !LC_IsYMIR())
            iSplitCount = number(1, 3);
        else if (GetMobRank() >= MOB_RANK_BOSS)
        {
            iSplitCount = number(3, 10);

            if ((iGold / iSplitCount) == 0)
                iSplitCount = 1;
        }
        else
            iSplitCount = 1;

        if (iGold != 0)
        {
            iTotalGold += iGold; // Total gold

            for (int i = 0; i < iSplitCount; ++i)
            {
                if (isAutoLoot)
                {
                    pkAttacker->GiveGold(iGold / iSplitCount);
                }
                else if ((item = ITEM_MANAGER::instance().CreateItem(1, iGold / iSplitCount)))
                {
                    pos.x = GetX() + (number(-7, 7) * 20);
                    pos.y = GetY() + (number(-7, 7) * 20);

                    item->AddToGround(GetMapIndex(), pos);
                    item->StartDestroyEvent();
                }
            }
        }
    }
    if (GetMobRank() >= MOB_RANK_BOSS && !IsStone() && GetMobTable().dwGoldMax != 0)
    {
        if (1 == number(1, iGold10DropPct))
            iGoldMultipler *= 10; // 1% Č®·ü·Î µ· 10ąč

        int iSplitCount = number(25, 35);

        for (int i = 0; i < iSplitCount; ++i)
        {
            int iGold = number(GetMobTable().dwGoldMin, GetMobTable().dwGoldMax) / iSplitCount;
            if (test_server)
                sys_log(0, "iGold %d", iGold);
            iGold = iGold * CHARACTER_MANAGER::instance().GetMobGoldAmountRate(pkAttacker) / 100;
            iGold *= iGoldMultipler;

            if (iGold == 0)
            {
                continue ;
            }

            if (test_server)
            {
                sys_log(0, "Drop Moeny MobGoldAmountRate %d %d", CHARACTER_MANAGER::instance().GetMobGoldAmountRate(pkAttacker), iGoldMultipler);
                sys_log(0, "Drop Money gold %d GoldMin %d GoldMax %d", iGold, GetMobTable().dwGoldMax, GetMobTable().dwGoldMax);
            }

            // NOTE: µ· ĆřĹşŔş Á¦ 3ŔÇ ĽŐ Ăł¸®¸¦ ÇĎÁö ľĘŔ
#ifdef DISABLE_YANG_BOMB
            pkAttacker->GiveGold(iGold / iSplitCount);
            iTotalGold += iGold;
#else
            if ((item = ITEM_MANAGER::instance().CreateItem(1, iGold)))
            {
                pos.x = GetX() + ((number(-14, 14) + number(-14, 14)) * 23);
                pos.y = GetY() + ((number(-14, 14) + number(-14, 14)) * 23);

                item->AddToGround(GetMapIndex(), pos);
                item->StartDestroyEvent();

                iTotalGold += iGold; // Total gold
            }
#endif
        }
    }
    // 1% Č®·ü·Î µ·Ŕ» 10°ł ¶łľî ¶ß¸°´Ů. (10ąč µĺ·ÓŔÓ
#ifndef DISABLE_YANG_BOMB
    else if (1 == number(1, iGold10DropPct))
    {
        //
        // µ· ĆřĹş˝Ä µĺ·Ó
        //
        for (int i = 0; i < 10; ++i)
        {
            int iGold = number(GetMobTable().dwGoldMin, GetMobTable().dwGoldMax);
            iGold = iGold * CHARACTER_MANAGER::instance().GetMobGoldAmountRate(pkAttacker) / 100;
            iGold *= iGoldMultipler;

            if (iGold == 0)
            {
                continue;
            }

            // NOTE: µ· ĆřĹşŔş Á¦ 3ŔÇ ĽŐ Ăł¸®¸¦ ÇĎÁö ľĘŔ˝
            if ((item = ITEM_MANAGER::instance().CreateItem(1, iGold)))
            {
                pos.x = GetX() + (number(-7, 7) * 20);
                pos.y = GetY() + (number(-7, 7) * 20);

                item->AddToGround(GetMapIndex(), pos);
                item->StartDestroyEvent();

                iTotalGold += iGold; // Total gold
            }
        }
    }
#endif
    else
    {
        //
        // ŔĎąÝŔűŔÎ ąć˝ÄŔÇ µ· µĺ·Ó
        //
        int iGold = number(GetMobTable().dwGoldMin, GetMobTable().dwGoldMax);
        iGold = iGold * CHARACTER_MANAGER::instance().GetMobGoldAmountRate(pkAttacker) / 100;
        iGold *= iGoldMultipler;

        int iSplitCount;

        if (iGold >= 3 && !LC_IsYMIR())
            iSplitCount = number(1, 3);
        else if (GetMobRank() >= MOB_RANK_BOSS)
        {
            iSplitCount = number(3, 10);

            if ((iGold / iSplitCount) == 0)
                iSplitCount = 1;
        }
        else
            iSplitCount = 1;

        if (iGold != 0)
        {
            iTotalGold += iGold; // Total gold

            for (int i = 0; i < iSplitCount; ++i)
            {
                if (isAutoLoot)
                {
                    pkAttacker->GiveGold(iGold / iSplitCount);
                }
                else if ((item = ITEM_MANAGER::instance().CreateItem(1, iGold / iSplitCount)))
                {
                    pos.x = GetX() + (number(-7, 7) * 20);
                    pos.y = GetY() + (number(-7, 7) * 20);

                    item->AddToGround(GetMapIndex(), pos);
                    item->StartDestroyEvent();
                }
            }
        }
    }