Board Thread:Game Discussions/@comment-75.169.4.237-20140620221821/@comment-23870891-20140621194022

If your aim is forgestone specifically, then fusion a mono-spirit with a mono-fire is your best bet. However, on top of a bunch of legendary and 3* armors you could get from that fusion, Arcane and Blazeborn could also result.

Combos could also be used, but they add other possibilities to the fusion table.

No fusion is guaranteed though.