A mimic in the shape of the front door which attacks when the PCs try to enter the house. The floor in front of the door is rotten and weak. A PC doing battle with mimic risks falling through it into the dark basement which is overgrown with deadly violet fungus, gas spores, and shriekers which begin to scream in a most horrific way.

I like a water weird in the fountain along with some bones. In the center of the fountain is a statue of a gargoyle (but not an actual gargoyle) covered in vines. Some of the vines are vine blights which live in symbiosis with the water weird.