It works on a few elite mobs in heroics, which helps, but not enough to really matter.
It's mostly a weak pvp talent. And not because -15% str/agi is super great for pvp, but because adding an extra magic debuff that your opponents have to cleanse is beneficial.
It's buffed on the WotLK servers to -15% to ALL stats. If it remains buffed, it'll be an amazing pvp talent mostly for the -15% stamina, but still not really a prot paladin talent.
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