Defeating the spider on impossible

[Metathron]

That sounds like good advice, I'll probably go back and get archmages again, for the shield, and provoke the spider to attack the giants (much like I did with the kraken).

If all the spots on the battlefield are full of one thing or other, and if none of your troops are standing next to the spider, what does he do I wonder?

[DGDobrev]

HE will attack the closest thing to his line of attack - be it a totem, a thorn or whatever

[Metathron]

D'oh! Silly me, there has to be something within his line of attack, if all of the spots are filled!