Clear. Thanks. And which skills are best to develop? For example, in Heroes 4, ranged combat is the most important, but what about here? And what magic can the Sylvan faction use to defend against other factions?
Added after 19 minutes
And I forgot something else...
What is the Achilles' Tear? It seems like you need this thing to complete the entire Castle, but where do you get it?
Achilles' Tear is the Grail; you find it the same way as in other parts of the game – by digging it up.