Real
City of the Dead takes up nearly all of the text space:
Underground. Shadow: Remove 2 burdens to play an enduring minion from your draw deck or discard pile.
Now, let's compare:
#6Underground. Battleground. Skirmish: Add 2 threats to play an enduring companion from your draw deck. It is twilight cost + 1 for each threat you can spot (limit once per turn).
#10River. Maneuver: Discard your Shadow card from play to play a minion from your draw deck. The Free People's Player may discard a Free Peoples card from play to discard that minion.
Just throwing that out there.
-wtk
Edit: In case you wanted to compare the rest:#1Sanctuary. Underground.Fellowship: Wound a companion to remove a threat.
#2Underground. When the fellowship moves from this site, exert each character.
#3Underground. When the fellowship moves to this site in the regroup phase, the Free Peoples player may draw a card for each exhausted companion in the fellowship (limit 3).
#4Underground. At the start of the regroup phase, the Free Peoples player may add 2 threats to take an enduring character into hand from his or her draw deck.
#5Underground. Each time a companion is played here, any Shadow player may place him or her in the dead pile.
#7Battleground. Shadow: Exert 2 Orcs to play an engine from your draw deck or discard pile (and if that engine is Grond, discard a fortification).
#8At the end of the first assignment phase here, exert each unassigned companion.
#9Response: If a fortification is transferred to your besieger, remove a threat to discard that fortification.
So...it looks like only 1, 2, 5, 8, and 9 would really fit onto a site card.
-wtk