Advanced Kill Boss Portal

local portalId, t = 1387,
{
    ["demon"] = {
        message = "You killed a Demon!",
        config = {
            createPos = {x = 100, y = 100, z = 7},
            toPos = {x = 100, y = 100, z = 7},
            portalTime = 5, --minutes
            storage = 123
        }
    },
    ["orshabaal"] = {
        message = "You have defeated Orshabaal!",
        config = {
            createPos = {}, --NOTE: You may use empty brackets to create the portal where the monster dies.
            toPos = {x = 100, y = 100, z = 7},
            portalTime = 1, --minutes
            storage = 123
        }
    }
}

local function removePortal(position)
    local portal = Tile(position):getItemById(portalId)
    if portal then
        portal:remove()
    end
end

function onKill(creature, target)
    if not target:isMonster() or target:getMaster() then
        return true
    end

    local player = Player(cid)
    local k = t[target:getName():lower()]
    if not k then
        return true
    end

    local pos, cPos = target:getPosition()
    if type(k.config.createPos) == 'table' then
        if next(k.config.createPos) == nil then
            cPos = pos
        else
            cPos = k.config.createPos
        end
    end

    local item = Game.createItem(portalId, 1, cPos)
    if item:isTeleport() then
        item:setDestination(k.config.toPos)
    end

    for i, damage in pairs(target:getDamageMap()) do
        local p = Player(i)
        if p then
            if p.getStorageValue(k.config.storage) < 1 then
                p:setStorageValue(k.config.storage, 1)
            end
        end
    end

    local pt = k.config.portalTime
    player:sendTextMessage(MESSAGE_INFO_DESCR, k.message .. " You have " .. pt .. " " .. (pt > 1 and "minutes" or "minute") .. " to escape!")
    addEvent(removePortal, k.config.portalTime * 60 * 1000, cPos)
    return true
end