You're looking for [*Fantasy Wargaming: The Highest Level of All*][1]; it's unmistakable. Here's the cover art:

[![Cover of "Fantasy Wargaming" book.][2]][2]

See [this writeup about it][3]:

> Did you know that God, Lucifer, Heimdall, and Sif all have Leo as their astrological sign!? This is why God has bonuses to his physical strength and social status, but a penalty to his religious faith. [...]


  [1]: https://en.wikipedia.org/wiki/Fantasy_Wargaming
  [2]: https://i.sstatic.net/BufrD.jpg
  [3]: https://writeups.letsyouandhimfight.com/mystic-mongol/fantasy-wargaming-the-highest-level-of-all/