
This card isn't terrible, I have had some fun using it, but it is generally a bit disappointing.
The resource cost of two wouldn't be much for a permanent asset, but for a one shot event it is fairly expensive, compared to the alternative of a skill card which is free. And the restrictions on Coup de Grace are really pretty limiting, unable to be combined with a weapon and usable only as your last action. Lots of times it would just sit in my hand waiting for that perfect moment, while I wished it was a card better suited for the situation I was actually in. The advantage of this card is that it is a totally automatic success, and that is a formidable advantage, the reason why you might consider including the card in your deck. But once I have a character who is set up with enough strength to intentionally enter combat, a skill card like Overpower would do a pretty good job making an attack very likely to hit, while being a lot cheaper and more flexible.
The saving grace of this card is having two strength icons, so it is actually can be used in the same situations as Overpower. But the card draw from overpower is quite a significant bonus, and with the skill bonus being so much more flexible, it is pretty tempting to simplify things by just taking Overpower and skipping this card. In general, I would only put this card in my deck if I had some space and wanted to try something different in my deck construction.