When Forbidding Flats enters the battlefield, sacrifice it unless you pay 3 life.
: Add or to your mana pool.
: Add to your mana pool. Put Forbidding Flats on top of your library.
When Forbidding Flats enters the battlefield, put a -1/-1 counter on target land.
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: Add 
or 
to your mana pool.
to your mana pool. Put Forbidding Flats on top of your library.
