int GetHasProtection(object oPC)
{
    // check to see if the PC already has a similar bonus
    // to stop them stacking loads of attack bonuses for
    // example by multiple praying at the same shrine
    effect eEff = GetFirstEffect(oPC);
    while (GetIsEffectValid(eEff)) {
        if (GetEffectType(eEff) == EFFECT_TYPE_CONCEALMENT)
            return TRUE;
        eEff = GetNextEffect(oPC);
    }
    return FALSE;
}

void main()
{
    // Get the PC who is praying
    object oPC = GetLastUsedBy();
    if (!GetIsObjectValid(oPC))
        return;

    // Don't reapply if we're already protected
    if (GetHasProtection(oPC))
        return;

    // define the benefits of praying at this altar
    effect eBless1 = EffectConcealment(20,MISS_CHANCE_TYPE_VS_MELEE);
    effect eBless2 = EffectConcealment(40,MISS_CHANCE_TYPE_VS_RANGED);
    effect eVis = EffectVisualEffect(VFX_DUR_GHOSTLY_VISAGE);

    //Link the visual and the damage reduction effect
    //delayed to ensure praying has finished
    //string all the first bless effect and the visible
    //effect together, then link any additonal Blesses with
    //the link (see commented out example)
    effect eLink = EffectLinkEffects(eBless1, eVis);
           eLink = EffectLinkEffects(eLink, eBless2);
    //if there was a third blessing
    //     eLink = EffectLinkEffects(eLink, eBless3);
    //etc.
    DelayCommand(15.0,ApplyEffectToObject(DURATION_TYPE_PERMANENT, eLink, oPC));

    //Visual effect of the blessing being received
    //Pick any VFX_FNF from the constants screen
    //(my personal faves, holy strike & meteor storm!!)
    ApplyEffectToObject(DURATION_TYPE_INSTANT,EffectVisualEffect(VFX_FNF_STRIKE_HOLY),oPC);
}