Instants and sorceries you cast cost 1 less.
When you cast an instant or sorcery place a charge counter on this. Then if there are 4 or more charge counters on this, you may remove the cpunters to transform this.
Tap: Add one mana of any color to your mana pool. If this mana is used to cast an instant or sorcery spell, make a copy of that spell, you may choose new targets.
It seems a little slow, but once its a land, well, that land is sum good. Who doesn't like doubling force of will, Gitaxian Probe, Gush, Bounty of the Hunt or Fireblast.....oh wait.
Serious note, could this see play in anything currently, or maybe help spike 5 color MUD? Dropping this turn 1 off Workshop followed by a FoW, Cantrip, Tfk, seems not bad.