When Krosan Needle enters the battlefield, sacrifice it unless you pay 1 life.
: Add or to your mana pool.
Sacrifice Krosan Needle: 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.
