In: l2jserver / gameserver / network / clientpackets / RequestMagicSkillUse.java

in the method -> runImpl ()

search for:

 		// Check the validity of the skill
        if (skill! = null)
        {

Add:
		+ if (activeChar.isInYourZoneName ())
        + {
        + // Prohibits buffs In YourZoneName
        + if (skill.getId () == 1234 || skill.getId () == 1234)
        + {
        + activeChar.sendMessage ("It is not possible to use" + skill.getName () + "Inside This Zone!");
        + activeChar.sendPacket (ActionFailed.STATIC_PACKET);
        + return;
        +}
        +}