The original blanket method that Toz came up with wasn't extraordinary or useful. It was the potential in the blanket method and what he derived from it that was what made it stand out.
Toz began by shaping the mana into a blanket-like sheet that he then wrapped around himself. He would then push on one area of the blanket until it entered his body, and after that, the rest of the blanket was sucked in as well. Aside from the added coziness of being wrapped in a blanket, the method didn't differ that much from the string method.
But right before Toz was about to give up on the blanket method, he absentmindedly looked at the Adaptation Trees crossing the battlefield some distance ahead of them.
The blanket method was obviously very different in terms of how it functioned when compared to the Adaptation Trees' bark. But they looked quite similar, which was why Toz remembered the bark and realized that it was quite similar to what Toz wanted to do.
