Howltooth Key enters the battlefield tapped.
, : Add to your mana pool.
: Howltooth Key becomes a 2/2 blue Merfolk creature until end of turn. It's still a land.
, 
: Add 
to your mana pool., : Add to your mana pool.
: Howltooth Key becomes a 2/2 blue Merfolk creature until end of turn. It's still a land.
