Grazie Pitta
Is there any understandable guide to the game? I've just started and I'm totally confused...
for example: if I "strengthen" a hero, is there a chance of failure? Is it just a way to get xp?
This is what I understood playing the game.
You have a party of heroes...doing quests you level those up (slowly).
Often completing quests gives you what I call 'prisoners'...other heroes that fill up your ranks in a legion.
You can then strengthen your main heroes sacrificing your lower ranks.
Doing so you will level up your main Heroes (watch out that XP and gold requirements depends on the colors used with extra gain or XP loss depending on the cool always onscreen gem help, in the upper right corner during quests).
When a hero is max level, you can evolve him/her using the REQUIRED artifacts.
The game will select those automatically IF YOU HAVE THOSE, watch out that they are displayed but grayed out if do not have the required ones...this was confusing for me in the beginning, because they are indistinguishable.
You can get particular artifacts doing quests or events (they change during the week).
I still miss EXACTELY what the stars are for (some 3 stars level 2 heroes are better than 2 stars level 10 heroes).
The glowing checkers behind a particular hero means he is a rare one.
At higher levels heroes have spells that kick in after a fixed number of rounds, then you have to wait.
Diamonds are required to summon heroes (better than the ones you get playing) and guardians, which I assume are even better, but I'm not sure.
Before each quest you can select an additional hero....it's chosen among your friends main hero (the one and only you select at the start, the only one which have an active and a passive skill) or random...it's an additional hero in your party just for the ongoing quest.
After you complete the quest you can add that char as a friend....you can choose him once per day, but every time you do you get 10 points instead of just 5 (this points earn you summon heroes capabilities).
The cool thing is that if both of you are mutually friends, and you play, your main heroes both level up....so you want to have active players as friends...so you will get powerful heroes to aid you in high level quests.
The difficult thing is that almost everyone now share the same name....
I wrote this in a hurry on my iPad....hope it helps to give you a general idea...ask if you need help (and if I know

)
There is an actual game guide hidden in the settings.
Despite all this difficult to learn things...I'm liking the gameplay a lot.