[Rq-rules] House Rule Query

[royce at efn.org]

Hi, All,
   I wonder if the following idea for a house rule would be a mistake.
   Instead of sacrificing POW, a character may sacrifice an animal at the
temple.  (Said animal must be bought from the temple priests at some
inflated price, of course.)  Better spells would require a larger, more
expensive animal -- goat for weaker spells, bull for stronger spells,
and human sacrifice a possibility for bad guys worshipping disreputable
gods.  (Ba'al, anyone?)
   So, would this make divine magic _too_ accessible, _too_ cheap?
   I am not wedded to the substitution notion, having merely stolen it
from Classical mythology, so please feel free to shoot it down.
   Thanks ahead of time for any feedback.
Asher