Invisibility

\src\server\game\Spells\SpellEffect.cpp

void Spell::EffectSanctuary(SpellEffIndex /*effIndex*/)
{
    if (!unitTarget)
        return;

    unitTarget->getHostileRefManager().UpdateVisibility();
++  unitTarget->CombatStop();

    Unit::AttackerSet const& attackers = unitTarget->getAttackers();
    for (Unit::AttackerSet::const_iterator itr = attackers.begin(); itr != attackers.end();)
    {
        if (!(*itr)->canSeeOrDetect(unitTarget))
            (*(itr++))->AttackStop();
        else
            ++itr;
    }