If I break it down:
Well, Well, Well. [3 Wells]
3x More Evil Wells [3 more Wells]
Bonus Event etc [Basic event notice]
The basic thinking is that you have 3x more chance to find a well in catacombs [pretty much think this]
Now, I [being me] can derive that this means you can find 3 times the amount of wells in a given catacomb... now I have found 4 once, do I assume that it implies that 12 wells can be found in a catacomb? [Doubt this very much]
Basically, the wording should be more direct:
"3x more chance to find a Well in catacombs"
Yup... I had to post this... hope the other events are better... you can pretty much tell when the next event is going to come out based on the 3 day notification etc.