-----Magic The Gathering question. I need something that causes my creatures to have trample.?

I'd use a Roughshod Mentor(G)(U). In fact I use two in my deck. The only damper on that is it gives trample ONLY to green. For getting your whites or any other color at that I'd suggest Concerted Effort(W)(R). This give all your creatures every basic ability (flying, first strike, trample etc.) you have in play.