Conlannalnoc [2016-05-15 02:45:09 +0000 UTC]
That happened in the Marvel vs DC, DC vs Marvel storyline in the 90s. Thor fought Captain Marvel (DC) and won by interrupting the bolt of SHAZAM from hitting Billy Batson a second time, but it "short circuited" the spell that returns his hammer to him. Wonder Woman found the hammer and was worthy enough to be given the full power of Thor.
A basic Google Image search for "Wonder Woman with Thor's Hammer" should provide a few of the images from the Thor powered Wonder Woman.
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