That's right. If they're non-unique, go ahead and play all 20 at once.
20 in my draw deck, but I can only play from hand so that would be 8 at once.
No but having 8 (I dont know how) in hand would mean you would only need 6 twilight to play them all.
If my shadow deck was only Uruk Regulars and I just hung on to them until site 5 and had 8 in hand...
I would need 9 twilight since the first uruk-hai doesn't count towards spotting.
3 for the first, 3 for the second, 2 for the third, 1 for the fourth, the rest are free.
Unless site 5 was
Deep of Helm, then I would only need 6 twilight.
So...I'll let my opponent stay ahead of me so my sites get played...make sure to have
Deep of Helm and
Palantir Chamber in my Adventure Deck.