To get around that problem, either add the "No Signature" enhancement to Mind Shield or switch to the Mind Block skill with the Camouflaged Mind Block technique from the 4th edition Supers book (pg. 38).
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"Anyone can be a winner if their definition of victory is flexible enough." - The DM of the Rings XXXV
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"Anyone can be a winner if their definition of victory is flexible enough." - The DM of the Rings XXXV