The vine shield does NOT always trigger on attack, just test it and see.
Would it be possible to see the game mechanics in the debug log? It would be great if someone familiar with the log would test vine shields, eye shields and the Medusa shield
I've assumed that the eye shield is non-resistible. I had SC with 25+ MR lose his eye in his first attack. (On second though, I think that SC was using the Mage Bane. He must have had 30+ MR) I've Also assumed that the Medusa shield (and ordinary gorgon petrification) used a MR check with a -4 penalty or something like that. I've had anti-thugs with 18-22 MR drop like flies against the medusa shield.