Arel Wars 2 Hints for Android
When you complete level 2-14 and you are playing as Adonis you unlock the wind walk (passive) and sword breaker hero abilities. The Succubus unit card is also avaliable in the shop.
I strongly suggest that if you can, try and get the daily rewards because a little bit of extra gold and gems won't hurt!
Also, if you have a spare bit of cash, consider buying gems and/or gold to unlock slots etc.
My personal preference is to not use items but if you feel the need to, than go right ahead. But be warned! Items are a single use only and you will have to keep buying them so use them wisely!
Good luck and Game On!