When Howltooth Vents enters the battlefield, sacrifice it unless you pay 2 life.
: Add to your mana pool. Activate this ability only if you control a Swamp.
: Add to your mana pool. Activate this ability only if you control an Island.
, , Sacrifice Howltooth Vents: Target creature gets -2/-2 until end of turn.
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: Add 
to your mana pool. Activate this ability only if you control a Swamp.
to your mana pool. Activate this ability only if you control an Island.
