From Portals of Phereon Wiki
They can be sold for 100 gold at Medium size and for 300 gold at Enormous size. Every level above 1 additionally increases their price by 5%.
- A giant sized, Max Level 5 Burrower will join with Qitou if you recruit her. You won't get much use out of Burrowers, much less the weak one that joins with Qitou, as you should already have end-game set-up and a full party by the time you reach the wasteland.