I think I know this answer but I want to be sure.

Can the ability of the Warlock Chieftan return a card that is slated for destruction by attrition die back to the top of your deck? I think that it can not since the ability says at the end of combat and attrition is resolved prior to the end of combat. But, I see this being a common question and would like clarification/consensus.

No. Attrition happens before End of Combat actions. On a side note because this will come up as well do to the Warlock's wording, he can only return himself or another unit back to the top, not both.

Thanks, that is what I thought. I needed to clarify since I cheated when I did my first solitaire then after thinking about it more closely realized that it was likely already destroyed. Its ok, I will keep wounding my nasty little berserkers and if the attrition misses, return them. If not, they are cheap.