example of monster using onSpikesDamage() for elemental damage

monster_using_elemental_damage_spikes.lua

-- Some things are not perfect here, existing examples in trunk are written this way however.

require("scripts/globals/status");
require("scripts/globals/magic");

-----------------------------------
-- onMobInitialize Action
-----------------------------------

function onMobInitialize(mob)
    mob:setMobMod(MOBMOD_AUTO_SPIKES, 1); -- Can be any non zero number, enables scripting of spikes.
    -- Additionaly, ANY spike status effect or setting the modifiier for spike effect power manually, is require to activate.
    -- I would like to change that in a later refactor, as it is a stupid requirement.
    mob:addStatusEffect(EFFECT_ICE_SPIKES, 10, 0, 0); -- This effect is setting the base power of spikes before LV or stat adjustments
    mob:getStatusEffect(EFFECT_ICE_SPIKES):setFlag(32); -- Makes effect unable to be dispelled
end;

-----------------------------------
-- onSpikesDamage
-----------------------------------

function onSpikesDamage(mob,target,damage)
    local INT_diff = mob:getStat(MOD_INT) - target:getStat(MOD_INT);

    if (INT_diff > 20) then
        INT_diff = 20 + ((INT_diff - 20)*0.5); -- INT above 20 is half as effective.
    end

    local dmg = ((damage+INT_diff)*0.5); -- INT adjustment and base damage averaged together.
    local params = {};
    params.bonusmab = 0;
    params.includemab = false;
    dmg = addBonusesAbility(mob, ELE_ICE, target, dmg, params); -- Checks for things like weather bonus
    dmg = dmg * applyResistanceAddEffect(mob, target, ELE_ICE, 0); -- Elemental resist and level correction happen here
    dmg = adjustForTarget(target, dmg, ELE_ICE); -- Checks for absorb/null element modifiers
    dmg = finalMagicNonSpellAdjustments(mob, target, ELE_ICE, dmg); -- Needed to check stoneskin, phalanx, etc.

    if (dmg < 0) then
        dmg = 0;
    end

    return SUBEFFECT_ICE_SPIKES, 44, dmg;
end;