When Swamp Forge enters the battlefield, sacrifice it unless you pay 1 life.
: Add or to your mana pool.
: Add to your mana pool. Put Swamp Forge on top of your library.
, : Target Knight gets +1/+1 until end of turn.
: Add 
or 
to your mana pool.: Add 
to your mana pool. Put Swamp Forge on top of your library., : Target Knight gets +1/+1 until end of turn.
