MArcomage

It's a very nice idea!

Halving the facilities seems a bit much, especially since this card costs a resource that generally isn't used toward facility reduction. In a deck with other facility-reducing cards, this could easily put your opponent at 1,1,1 without drawing from the same resources that had reduced the opponent to 2's.

Doing this in addition to halving (most) everything else is absolutely brutal, and all for only 35 bricks?

Maybe the standard effect of this card is a bit brutal as you say and could be switched with the effect for stock, but don't forget, this card is a rare, and the rest of its effects are extremely situational.

Old version:

35 Bricks
Destruction.
N = total enemy facilities
If N = 3
Halves enemy tower
If N < 6
Halves enemy wall
If N < 9
Halves enemy stock
Always:
Halves enemy facilities

I liked the original concept, but it is now modified because it's just too many lines of text. New version:

Destruction.
If enemy facilities = 3
Halves enemy tower, wall, & stock
Always:
Halves enemy facilities

Now that it only performs the extra reductions if Facilities are already 1/1/1, I don't feel it overpowered as I did before. Would be an interesting card to play following Wonder.