(: Add or to your mana pool.)
When Howltooth Slagheap enters the battlefield, sacrifice it unless you pay 3 life.
, Sacrifice a Swamp: Add to your mana pool.
, : Target land becomes a 2/2 red Giant creature until end of turn. It's still a land.
: Add 
or 
to your mana pool.), Sacrifice a Swamp: Add to your mana pool.
, : Target land becomes a 2/2 red Giant creature until end of turn. It's still a land.
