Cost per tile: 300
Health per tile: 350

Monster Attracts:              Size Needed:                  Also needs:
Hell hound                              9 tiles                               None

The Scavenger Room is a powerful tool if you have the resources to pour into it - it's expensive and keeping monsters there will cost you dearly. But placing creatures in it will begin attracting other creatures from the portal and from your enemy.
The more creatures in the room, the higher your "scavenge value." Multiple creatures of the same type will have a greater chance of attracting the same type and a Vampire placed in the Scavenger Room will increase your scavenge rate by 50%.
 If you detect scavenging on one if your minions, grab the creature and place it in  the temple.  This will protect it from scavenging for a while.
Placing one creature in the temple will  not only protect that creature, but up to two others of the same type.   So, if you place a Warlock in the temple, you can protect two other warlocks from scavenging while they continue to work.  If the warlock in the temple leaves (to get paid, to eat, or to sleep), that Warlock will continue to be protect for a few minutes, but the other two are not.