Re: what game is erfworld based on?
Age of Wonders has some interesting comparisons:
Eight unit stacks.
Heroes with an unit enhancing "Leadership" ability.
Unit called "Doom Bat": it's a really big bat.
I haven't played much of them, but I would not be suprized in the least if either Rob or Jamie has played one of the games in the Age of Wonders series.
I seem to have the ability to misinterpret the most obvious of meanings and to completely miss the points of statements for no obvious reason. Just a warning.