Where do you get catnip in epic battle fantasy 3

First, go back to meow meow the cat (that you got the quest from) go down one map to the grave yard with the dog and graves, there's a huge old abandoned house, you cant miss it, you need to get an old key which would be in the desert which you find in a chest. you get an AWESOME skill from this quest and you get an achievement for using the skill.