Deck challenge: Pick a word challenge

the challenge is
Pick a word, from three to five letters long. Build a deck about that word, using only cards beginning with one of the word's letters. (So, if my word is WATER, I can only use cards whose title begins with W, A, T, E, or R.) Basic lands CAN still be used. (So I could still use Islands.) All the letters in your must be represented in your deck, and the deck you build has to have something to do with the word you chose.