I realize this may be a tough one but perhaps someone has found some information on this online which I missed...
The final Battlefields board, the battle of the Black Gate, does not have any square 'attack spaces' where enemies can be defeated by paying two star icons. However, the central space of the board, the one with the Red Eye, does have a square shape. Now of course the damage dealt from that space means the game is immediately lost, but I was wondering if it is possible for the active player to pay two star icons the moment an enemy enters this space, thus defeating him before he can deal that space's damage---or is the fact that the 'Red Eye' space is square completely irrelevant?