You can lure a Platypus by burning lavender. If you burn this flower and equip it with a pet platypus already out, the platypus gains some special dialogue about the lavender smell. Lavender, as well as Tansymum and Fever grass, cannot be lit outside of Oo'glog. Burning lavender is a great way to obtain ashes in bulk, especially when you put lavender and smouldering lavender on your action bar, and use the hotkeys.