When Overgrown Tar Pit enters the battlefield, sacrifice it unless you pay 1 life.
: Add or to your mana pool.
Put Overgrown Tar Pit on top of your library: Add to your mana pool.
Cycling (, Discard this card: Draw a card.)
: Add 
or 
to your mana pool.
to your mana pool. (, Discard this card: Draw a card.)
