If any of those Faeries have double strike or first strike, the ability will trigger once for each player dealt damage in each combat damage step
Limit Break seems to have a focus on equipment and making creatures exceed 3 power this may seem minor, but based on precedent, there will most assuredly be cards to support this strategy
Bloodchief Ascension's first ability checks how much life was lost by each opponent over the course of the entire turn, even if Bloodchief Ascension wasn't on the battlefield the whole time
As a result, I was also a lot more geeked to see the return of Sengir Vampire in Magic 2012
There were constant boardwipes, fogs, plenty of blocking, and by the time you could get a good board, someone would either Cyclonic Rift or combo off
So, it becomes unblockable