New mod commands

[Edi]

Kristoffer O said:
Not sure, but i think that one is hardcoded. Unit nbr x and unit nbr y are removed after one battle. Thus not as easy to make moddable as the other fx's.

There's other hardcoding related to Retiarius and Gladiator as well, namely that their resource cost is 1 despite the equipment they have and other units with same stuff have a resource cost that matches the equipment.