Well i just had the same idea last night come to find out not an original one lol but at least you can win with just by waiting them out to run out of land cards to play or slowly beat them to death with the specter
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forest forest channel turn 2 lose 15 life Emrakul, the Aeons Torn can't be countered and played from hand for full mana cost so you get the extra turn pretty simple
Deck link: http://www.mtgvault.com/ViewDeck.aspx?DeckID=152357
For a good mana base for legacy weapon and fist of suns i use birds of paradise bloomtender scuttlemut and transguild courier with scuttle and transguild giving me all colors the bloomtenders tap for all colors andthat works really well with legacy and fist i dropped the birds out and put in maelstrom angels and a few other eldrazi for enchants prismatic omen is awesome. if you are focusing on the legacy mana reflection is pretty good too just some ideas
Pattern of Rebirth
I don't know what exactly you're trying to do but some cards that might help prismatic omen rules say that because it makes all of your lands all land types they can produce any color. Another is bloom tender and transguild courier or scuttlemutt. Fusion elemental. There's some ideas for ya ill find some more and comment again hope that helps