Presumably there is some function written into Forge that allows it to select the "best creature" in general situations, for instance if the computer wants to use a removal spell it will determine whatever it thinks is the best and target it. Similarly it seems to have a "worst creature" function so it knows what guy to sacrifice and so forth.
Has anyone tried to do
Preacher? It's a very weird card since it lets the opponent choose the target, but if the computer is able to pick its "worst creature," wouldn't this be possible? Other than that it's basically the same as
Rubinia Soulsinger.