Krosan Fountain enters the battlefield tapped unless you control one or more creatures.
: Add to your mana pool.
: Add or to your mana pool. Each opponent gains 1 life.
, Sacrifice Krosan Fountain: Target creature gets +2/+2 until end of turn.
: Add 
to your mana pool.: Add 
or 
to your mana pool. Each opponent gains 1 life., Sacrifice Krosan Fountain: Target creature gets +2/+2 until end of turn.
