Same/Wall is correct!

I surround you with strength in each dimension - Each piece of wall can be considered an A, the strongest value
Though I'm not offensive, do pay attention! - It doesn't directly attack your cards
I'll help you, if properly employed - Use it right and it will be to your advantage
Neglect me? Expect to be destroyed. - If you don't watch out, your opponent can use it against you
So bring out your strong side and show me it - Use your cards so that their A's point outwards, towards the wall
Your opponent's face will turn blue in a bit! - Then, the faces of your opponent's cards will turn into blue.

Good job footem!