When Howltooth Vents enters the battlefield, you lose 2 life unless you reveal a multicolored card from your hand.
: Add or to your mana pool.
Sacrifice Howltooth Vents: Add or to your mana pool.
, : Add one mana of any color to your mana pool.
: Add 
or 
to your mana pool. or to your mana pool.
, : Add one mana of any color to your mana pool.
