Quote Originally Posted by horsewithnonick View Post
I'm new here, and far from an expert, but I don't get why Extended Spell rates so low - Shield, Blade Ward, and Color Spray are all terrific low level spells whose main limitation is that they last just 1 round. Casting any of those with a 2 or 4 round duration, long enough to enjoy the benefits for most of a fight, seems worthy of greater than a trash rating.
The affected spell must already have a duration of at least 1minute. So sadly shield is not a valid extended spell.