帮会龙头：龙头棍争夺的保管增益

local function grabDragon(actor, guild)
    local holder = getsysvar("dragonHolder") or ""
    if holder == guild then
        sendmsg(actor, 1, "龙头棍已在本帮手中")
        return
    end
    setsysvarex("dragonHolder", guild)
    setsysvarex("dragonAt", os.time())
    sendcentermsg(0, guild .. " 夺得龙头棍！")
end

local function dragonBuff(actor, guild)
    if getsysvar("dragonHolder") ~= guild then
        sendmsg(actor, 1, "本帮未持有龙头棍")
        return
    end
    setplayvar(actor, "atkBuff", 3)
    sendmsg(actor, 1, "龙头加持，攻击 +3%")
end