I don't think cards having 2 cultures is in any way an issue - not mechanically nor for balance. Broken combos? I'm not sure there are any. Better deck-building options? Sure as anything it gives you that.
There are several ways I've seen this done in the past:
1) Just put the cultures on the top of the card. Literally it would be
![Dunland [Dunland]](https://lotrtcgdb.com/forums/Smileys/classic/dunland.png)
![Evil Men [Men]](https://lotrtcgdb.com/forums/Smileys/classic/men.png)
, and the card background theoretically would be split between them.
2) Do culture-shifting rather than dual cards. So things like
![Elven [Elven]](https://lotrtcgdb.com/forums/Smileys/classic/elven.png)
Gimli,
![Rohan [Rohan]](https://lotrtcgdb.com/forums/Smileys/classic/rohan.png)
Merry etc.
Aragorn, DoR is obviously the prime example of this.
3) The keyword
alliance. This was used by menace64 a while back.
Alliance ![Isengard [Isengard]](https://lotrtcgdb.com/forums/Smileys/classic/isengard.png)
means you can replace any culture symbol in the text of this card with
![Isengard [Isengard]](https://lotrtcgdb.com/forums/Smileys/classic/isengard.png)
at any time. So you might have a
![Sauron [Sauron]](https://lotrtcgdb.com/forums/Smileys/classic/sauron.png)
card that says:
Pump ![Sauron [Sauron]](https://lotrtcgdb.com/forums/Smileys/classic/sauron.png)
Event • Skirmish
Alliance: ![Isengard [Isengard]](https://lotrtcgdb.com/forums/Smileys/classic/isengard.png)
Make a
![Sauron [Sauron]](https://lotrtcgdb.com/forums/Smileys/classic/sauron.png)
minion strength +2. If you can spot a
![Sauron [Sauron]](https://lotrtcgdb.com/forums/Smileys/classic/sauron.png)
condition, draw a card.
4) Culture keywords, which was my idea when you couldn't change the templating. Basically you might have an
![Isengard [Isengard]](https://lotrtcgdb.com/forums/Smileys/classic/isengard.png)
Orc that has in his keyword box:
Damage +1.
. This means that he is also an
![Orc [Orc]](https://lotrtcgdb.com/forums/Smileys/classic/orc.png)
minion and it functions exactly like a normal keyword.
Also like to share a quick idea I had about signets. Why couldn't you conceptually use the pictures of the signet, or the character's black and white faces, when you mention them in card texts?
Horn of the Mark would become "Bearer gains [Théoden]."
This also allows you do a template like:
Guard of Meduseld ![Rohan [Rohan]](https://lotrtcgdb.com/forums/Smileys/classic/rohan.png)
Companion • Man
Str: 6
Vit: 3
Res: 6
Valiant.[Théoden].
Imagine a card with all three stats and then a big Théoden signet over his text box? See what I mean?
All that said, we're going to have to make some choices about what can fit in this set and what can't. I'm not sure there's room for both revamping signets and dual culture cards, as well as dealing with the themes that the set title gives us (like corruption, search/stealth, deck/hand manipulation).
But, taking a lesson from MTG, when they introduce a new concept, they often introduce only a small amount of it at first. Then if it turns out to be popular and interesting, they'll bring it back in a big way later. Main case study being hybrid colour cards that began with only a few cards in Ravnica block, then a whole hybrid mini-block with Shadowmoor/Eventide.
So, what we could do is do sprinklings of signet/cultural stuff rather than making a huge deal out of it.
Thranduil