ambient_orange: Alright some more questions i got:
1. what is precise strike? (warrior gets it with combat skill)
2. why arena is much harder than labyrinth? (so far labyrinth gave much better items.. Arena gave me bit of gold(beginners league)
3. will there be outpost improvement so that enemy will siege it for longer?
4. at the moment i have two lords like me with their own personal floating worlds. Will they be there forever or will i finally conquer theyr own worlds?
5. how badly i can lose long term campaign if i choose wrond shards to conquer all the time?
1) Precise strike, IIRC, bypasses up to that amount of defence when you strike an enemy. For future reference, if you right click a skill's icon(which in this case is found in your hero screen, but it can also be on the screen for a unit, or an item/spell), it'll give you a detailed explanation of how the spell works.
2) I don't know. I believe you can repeat the arena, though, whereas once you get to the heart of the labyrinth I've heart it's destroyed.
3) Yes. They also unlocks more and higher tier troop slots, but they're very expensive, so you're unlikely to use them everywhere. They also take 2 turns to make, of course.
4) In a few shards you'll be able to ask [oh, wow, I've somehow forgotten his name: your servant gremlin] that very question. You can, but have to get a large enough world before you can invade other people. If you win, then they're destroyed completely. Be warned that this can also happen to you!
5) Don't know, haven't finished the campaign yet.