Missing letter writing (English Matrix)

There once lived a mythical creature which took the form of a toad, This Mythical creature was able to wield a sword one that could rip into space and time itself. When you look at a Toad you see beauty but this wasn’t the real form of the toad, the real form of the toad was a unicorn. One whose main and tail was as shiny as a pastel pencil, and a coat which was as white as the snow that fell down from the sky on a cold afternoon.