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Message: <blockquote data-quote="Numion" data-source="post: 1688427" data-attributes="member: 124">It most certainly does. Let me formulate:Without the feat you'd succeed on X results out of 20 (=x/20), depending on the DC. With the feat, you'd succeed on X+2 results out of 20 (=(x+2)/20). Now the probability for succeeding because of the feat is P(succeed with feat)-P(succeed without feat)=(X+2)/20-X/20=2/20=1/10Now X was the only thing dependant of spell DC or save bonus, and those got cancelled out. This is conditional to the DC being within save bonus + d20 roll range, which isn't unreasonable. I can't understand why it's difficult to understand that hitting the 2 numbers on a d20 is always 1/10 probability, and only when you hit those two numbers does having the feat matter. If you read my first post you'll notice I wrote that my players always take these feats at higher levels. I just wrote some analysis for greater understanding. Most people don't understand how rarely those feats really matter. But when they do, you're golden, in case of some nasty fort saves.</blockquote>