Board Thread:Theories and Speculation/@comment-30168130-20161018012337/@comment-732150-20161018033546

What Yamato did was not three at the same time. Wood is earth and water being used together, mixed, at the same time. The hill and waterfall remaining isn't the jutsu still being actively used, just their effects. Not all jutsu ceases to function when a user stops using it. If Yamato creates a tree with Wood Release, the tree doesn't stop existing after he stops. Minato's seal on Naruto didn't disappear when he died.