Penetrating Stench is an Ability.
Penetrating Stench reads:
If an enemy model is engaging multiple models (let's assume two (2)) with Penetrating Stench, does it need to resolve all instances?
First, it is an Ability (as noted above) and it does NOT have a +#. However, the model engaging does not GAIN the Ability...
It is also not an Aura (which would have limited it to one instance).
So, assuming both instances must be resolved, the model, having cards, would need to discard at least one card (based on "This or That" Choices on p33), correct?
If it gains the Stunned condition on the first one, it cannot gain the Stunned condition on the second, and therefore, if it has cards, must then discard.
Likewise, if it had only one card, it could discard to satisfy the first instance, but would then need to gain Stunned (if able to do so - or the effect is ignored).
TL;DR - Activating while engaging multiple models with Penetrating Stench will or will not cause multiple Penetrating Stench effects?