Talk:Castle Age: Heart of Darkness/@comment-26372354-20150512144007/@comment-4010041-20150512151000

There is really nothing to research.

The info you are looking for is in the Notes section of Thanatos of Fire & Ice: http://castleage.wikia.com/wiki/Thanatos_of_Fire_&_Ice#Notes

1.  You cant get the Crystallized Dragon Soul from HoD anymore of course

2. SO, you cant alchemize the Flamewalker Greaves anymore

That is really all there is to know.