Elven Key enters the battlefield tapped.
: Add to your mana pool. If you played a land this turn, Add to your mana pool instead.
: Elven Key becomes a 1/1 green and blue Leech Beast creature with flying until end of turn. It's still a land.
: Add 
to your mana pool. If you played a land this turn, Add 
to your mana pool instead.
: Elven Key becomes a 1/1 green and blue Leech Beast creature with flying until end of turn. It's still a land.
