My Lands: Black Gem Hunting

I did as you said, feeling good that I wouldn't waste troops and get nothing for it again and didn't but I did get a message that the attacked failed to find anything to attack. When I looked on the map that ruin was gone with the normal crumbs remaining. I have been also getting messages about ...

I just sent a two wave attack against a RUIN. The first wave defeated all of the monsters. My second wave was to carry off all of the loot, but it says that my troops did not find a target. I am not happy that I used all of those first wave troops and defeated the monsters soundly, but got cheated ...