MArcomage

This is basically a 1:2 conversion of bricks to wall, which is pretty much standard for commons/uncommons. Therefore, this seems pretty weak for a rare. I'd suggest increasing the effect or reducing the cost.

The actual Great Wall was built to ward off invaders, so maybe it could have another effect like discarding all the opponent's attack cards and replacing them with commons?

It was built with that intention, but history notes that it wasn't very effective at that. ;)

Maybe let it build maximum wall?

I don't think being the same ratio of bricks to wall as more common cards is necessarily as bad as you think; that ratio gets worse the more wall the card builds; for example:
Palisade wall: 2 wall, 0 Bricks,
Basic wall: 3 wall, 1 Brick (when condition not met!)
Gate: 7 wall, 3 Bricks
Fortified wall: 8 wall, 4 Bricks.
Given the magnitude of its impact, Great Wall of China is actually a much better ratio than the above pattern would suggest.

this card is still awfully weak when comparing to other rare "survival cards", currently there's no reason to pick this one instead of Fortified castle. (i do think +wall cards needs some tweaking in general to match upp against the recent buff of +tower cards.)

Thanks for bumping this. I still definitely think this card needs a buff, and the Christmas update would be a great time to do it. I still like my original idea of discarding attack cards, but increasing the wall amount would also work.

what about to add "discard all tower- cards from opponent's hand"? it could improve it's defence power not only against pure attack cards...

How about discard any support card (those that are selected if you choose "any keyword" in support filter)?

I think it will be a little confusing which cards will be affected, especially for new players...

when the AI uses the card it gives +102 Wall when its short game mode and max Wall is 150 thus should only give 75 Wall

Please provide a game replay, but my guess is that Far sight effect triggered and provided the wall gain.

damn that could be it how i didint thought about it damn...

I have no problem with Great Wall of China in Long mode its just bad in short mode maybe make it always add +110 Wall