Games : What does the Fate ability on the Guillotine scythes in Darksiders 2 do?

I've been searching for a definitive description of the special abilities for the various weapons, some have some information on forums, wiki/wikia, or guides, but I've yet to see anything that sounds definitive for most of the weapons. The one I'm looking for in particular right now is the Fate ability on the Guillotine scythes. I've found some hearsay that states it either guarantees a critical hit or it increases the odds of executions occurring, but there doesn't seem to have been much discussion on any of those threads.