Not realy original but it kills turn 3-4 almost every game and uses only commons.
60 cards
4 Ancient Spring
4 Irrigation Ditch
2 Island
4 Sulfur Vent
14 lands
4 Cabal Ritual
2 Chromatic Sphere
4 Chromatic Star
3 Compulsive Research
4 Dark Ritual
1 Empty the Warrens
4 Grapeshot
4 Ideas Unbound
4 Lotus Petal
4 Manamorphose
4 Ponder
4 Rite of Flame
2 Seething Song
2 Shred Memory
46 other spells