Forum adverts like this one are shown to any user who is not logged in. Join us by filling out a tiny 3 field form and you will get your own, free, dakka user account which gives a good range of benefits to you: No adverts like this in the forums anymore. Times and dates in your local timezone. Full tracking of what you have read so you can skip to your first unread post, easily see what has changed since you last logged in, and easily see what is new at a glance. Email notifications for threads you want to watch closely. Being a part of the oldest wargaming community on the net. If you are already a member then feel free to login now.

Been searching quite a bit for threads about this but can't seem to find the definite, true answer. In some guides even I am told to go to "You Make Da Call" for proof that the Icon works instantly. And elsewhere it is stated it doesn't.

Which one is it, why, and source?

( For clarification, I'm talking about say, Seekers of Slaanesh Deepstriking/Outflanking with Icon, and another unit arriving via Deep Strike on the same turn - does the other unit benefit from the scatter reduction of the Icon instantly? )

Yes, it can work just fine.

Mainly because it states it works, and has no restrictions on when it does not work.