User blog comment:Emptylord/Custom Champion - Eury the Damsel of Distress/@comment-5686533-20150609061458/@comment-3974211-20150609103110

At present, the haze is a persistent, point-blank area of effect (like Fiddlesticks, Kennen, Karthus, Maokai, etc). However - the fact the enemies can see the haze gives away the fact she's hiding someone, since she has no need to activate the ability for selfish reasons. This means all the enemy doesn't know is who she's hiding - but that has limited applications (not necessarily a bad thing, but there could be more). The tabber proposes a version similar to Ekko where enemies will always know that her ultimate is available (the similarity to Ekko ends here), but they won't know when she's activated it.

Nomad benefits from Sandstorm by himself.