Gilded Elf

Transubstantial (When you cast Gilded Elf, choose
Artifact or Enchantment. Gilded Elf is the chosen
type in addition to its other types.)
{t}: Add {g}.
As long as Gilded Elf is an Artifact, it has "When
Gilded Elf enters the battlefield, draw a card."
As long as Gilded Elf is an Enchantment, untap it
at the beginning of each upkeep.