Elven Chorus

{g}{g}{g}: Create a copy of this artifact. Any player
may activate this ability.
{g}{g}: Level Up!
Levels 1-2: Elf creatures you control get
"{t} Add {1} to your mana pool."
Levels 3-4: Elf creatures you control get +1/+1
and "{t} Add {1} to your mana pool."
Levels 5-6: Elf creatures you control get +2/+2
and "{t} Add {g} to your mana pool."
Levels 7+: Flip Elven Chorus