Who's Furlbog?

How to complete quest "Cleansing the Afflicted"?

Furlbog are probably those Blackwood monsters with spear (yellow fur) and with magic attack (black fur).

Below are steps to 'cleanse the afflicted':

1. Attack Maddened Blackwood or another kind of Blackwood monster. Get it to less than 25 percents health.
2. Click the herb's icon to use it.
3. Kill both furlbog and slime.

This is Fleetfoot

There is only one of it not far from where Consumed Thistle Bear are roaming about.

This is how to use The Orb of Elune

1. Kill an enraged Tidal Spirit 
2. Click on its remains but do not loot 
3. Use that orb

This is where the incense is!

Right there marked with downward arrow.