Blue's creatures tend to be weaker than creatures of other colors, but commonly have abilities and traits which make them difficult to damage or block, particularly "flying" and to a lesser extent "shroud". Blue is best at letting a player draw additional cards permanently taking control of an opponent's cards returning cards to their owner's hand and countering spells, causing them to be discarded and the Mana used to pay them wasted.White's weaknesses include a focus on creatures, its unwillingness to simply kill creatures outright (instead hobbling them with restrictions that can be undone), and the fact that many of its most powerful spells affect all players equally-including the casting player. Numerous white creatures also have "First Strike", "Lifelink", and "Vigilance". White creatures are known for their "protection" from various other colors, or even types of cards rendering them nearly impervious to harm from those things. White's strengths are a roster of small creatures that are strong collectively: protecting those creatures with enchantments, gaining life, preventing damage to creatures or players, imposing restrictions on players, reducing the capabilities of opposing creatures, and powerful spells that "equalize" the playing field by destroying all cards of a given type.The more colors you choose for your deck to incorporate, the higher the chance that you will encounter a situation where you will be unable to cast one or more of the spells in your hand due to lacking one (or more) of the colors of mana those spells require in their “mana cost”. You will be able to cast “Colorless” spells (spells that have no colored mana symbols in their “mana cost”) regardless of the color(s) you choose. The color(s) you will use in your MTG deck will determine which “Land” cards that you will put in the deck.See what cards you can imagine yourself playing and what style suits the way you think. Play around on sites like MTGDeckBuilder and MTGVault.