can Someone explain how to complete Nature and Ice raid? I stuck there, can you guys suggest best formation or fight strategy and how to complete those raids

I already completed all other quests characters are 60+ level.

And 1 other question how to increase army level, and how to find Elvish artifact ?

there walkthrough guide for ice raid and nature raid in faq section walkthrough under download game but for information try do ice raid 60 if got few legendary equipment and weapon formation however you come up with i think do with card you pick just pay attention boss use blizzard skill that does buff usually 1 hit kill i don't remember resist mag att stats and shield mage resist skill

Eleven artifacts you get special bonus bandit map random map artifact random take while get one but random trader at central aldyn map  i think option exchange artifact if you trying getting specific one