Jimdoria, 

 I agree; however, my version was grammatically correct; JimD changed it to its current version. I had written: 
 For instance, if a Magician made slight changes in the world of formation (Olam Yetzirah), such as within the Sefirah of Yesod upon which Malkuth (the material realm) is based and within which all former Sephiroth are brought together, then these alterations would emanate into the world of action (Olam Assiah).