As the name suggests, this is a mono white deck that plays a lot of small creatures. The creatures of choice are often among others White Knight, Savannah Lions and Tundra Wolves. Other cards that usually see play are Swords to Plowshares, Disenchant and of course Crusade. Sometimes you also find power houses like Armageddon and Serra Angel in the deck.
And then we have the sideboard which can be filled with a plethora of great answers to a lot of different strategies. It has Circle of Protections against burn and mono colored decks, City in a Bottle and King Suleiman against some of the most powerful creatures in the format and last but not least it has Divine Offering and Dust to Dust to combat artifact heavy decks.