I use this analogy a lot when explaining splashing colors to people. Imagine your red/white deck is a chocolate chip cookie recipe. You can add walnuts (green cards) to give it a different flavor but if you add one walnut what are the chances you'll get the cookie with the one walnut in it? To go a bit further you don't want to make a oatmeal, raisin, chocolate chip, peanut butter, walnut, pecan, dark chocolate, sugar cookies either. That's too much and it might just make you sick.
Like drgolovacroxby said, trade it for the cards you need. Hanging on to one card isn't going to help you when you can get a set of something else. Lands are a good investment to make. Try to trade value for value. Voice is still a $30 card. That's 3 sacred foundry's or a set of hellriders plus value. Voice of resurgence goes in a completely different style of deck. Same thing goes for some of the other cards in your inventory. There's lots of cards you can unload to build one solid deck. Sorin, temple garden, godless shrine, deadbridge chant... someone will want these cards. Trade them and get the things you need.
You should really also decide on a deck-list to build. There's the one I posted early, that works well. There's red/white (boros) aggro, Red aggro (RDW). These decks are all different and will take you a while to build so you need to work towards one of them.
Last edited by elpablo (2013-05-13 20:23:39)