Armour type upgrades and special attacks

[StarEd]

Is it possible to create (withing .xml) an upgrade changing type of attack or armour (e. g.  Leather -> Plate)? A unit tag
<armor-type value="Organic"/>
doesn't work as an upgrade tag.

Also - would it be difficult to add special types of attack (decreasing enemies' sight, steeling HP, slowering, causing 10% damage, etc)?

[martiño]

Unfortunately there is no way of doing this with the current version of the game,  the only way would be modifying the source code.

[StarEd]

So - is it possible to implement such modifications (in the next version)?
If it could be done with a little effort then you could enrich the game with minimal cost.

Anti-magic armour upgrades, blinding flames against archers, poisioned arrows excellent vs dragons, vampiric blades - those are only few things which would make Glest even more interesting.