Randomize weapon element

function Item.setRandomElement(self)
    if self:getType():getWeaponType() == WEAPON_NONE then
        return
    end
    local elements = {COMBAT_FIREDAMAGE, COMBAT_ICEDAMAGE, COMBAT_DROWNDAMAGE, COMBAT_EARTHDAMAGE, COMBAT_ENERGYDAMAGE, COMBAT_DEATHDAMAGE, COMBAT_HOLYDAMAGE}
    self:setAbility(ITEM_ABILITY_ELEMENTTYPE, elements[math.random(#elements)])
    self:setAbility(ITEM_ABILITY_ELEMENTDAMAGE, math.random(50, 250))
end

local weapon = player:getSlotItem(CONST_SLOT_LEFT)
weapon:setRandomElement() -- picks a random element with 50-250 damage, all attacks from then on