[chrispedersen]

Throne of wild magics:

Grants 1 of each gem
Also Randomly grants each Turn one of:

Conj 30:
Ench 30:
Alt 30:
.
.
.
etc

So, here's how you do it.
Dominions has the ability to run a pre exec or post execut file each turn, usually used to backup turns etc.

Whatever batch file you usually run, include other modules. In this case a batch file to modify the map file or .dm file. In this case to randomly change the site bonus.

A similar idea could be used to change unit stats from turn to turn, or

You could also replace the unit that won the arena fight with another similar unit. Soooo for example ... the Arena of Death.

Who ever wins - is turned into a Mound Fiend... or vampire.