Isn't that a passive aura? I'd have to check on my server considering it seems as if Blizzard updated the spell. So, it would seem that this procs on melee attack or something. It has been awhile since I used ArcEmu's hacky HackFixes, but here it goes..
This spell is passive, but I don't know the spell that is suppose to be triggered for Improved Icy Talons. Since this is passive, it should, at all times show up on your screen as an aura without going away. However, I'm not sure how it is done with ArcEmu. This is what I came up with:
Note that "[EFFECT HERE]" requires another spell to be triggered as Improved Icy Talons effect. Would be a lot easier if ArcEmu had a better system for handling spells..
sp = CheckAndReturnSpellEntry(55610);
if(sp != NULL)
sp->procFlags = PROC_ON_CAST_SPELL | static_cast<uint32>(PROC_TARGET_SELF);
sp->EffectApplyAuraName = SPELL_AURA_PROC_TRIGGER_SPELL;
sp->EffectTriggerSpell = [EFFECT HERE];
sp->procChance = 100;