When Leechridden Ruins enters the battlefield, sacrifice it unless you pay .
: Add or to your mana pool.
: Leechridden Ruins becomes a 2/1 black and green Rat creature until end of turn. It's still a land.
.
: Add or 
to your mana pool.: Leechridden Ruins becomes a 2/1 black and green Rat creature until end of turn. It's still a land.
