Good concept, but there is a HUGE problem with pay wall. If you get stuck at a boss on the board, you will NOT be able to exit out and go to a weaker board to grind for gold or exp. There is a daily limit to farm gold, but, EVERYTHING uses gold, and if you have no gold, you can't even level or gear up. Not generous on the summoning, and if you get good units, good luck getting resources to level them up due to lack of gold. Gear find is extremely limited too, and gear goblin can remove the find.