The palipus plant

Found near the beaches of Skarpticus’s vast deserts are massive palipus plants. These plants spend their entire lives gathering water into their giant spike-covered sac, retaining it and slowly drinking it to survive. Once pollinated, the plant will begin to grow its massive pod-like fruits. When the fruit matures, the plant violently contracts its spiky reservoir, causing all of its collected water to rush into the fruit. The sudden change of pressure causes the hard shells to crack open, revealing the fleshy innards for all to feast upon. This action kills the plant in the process, leaving the fate of its fruit in the hands of whatever may stumble across it.

Its entire existence relies on being so nourishing that it keeps whatever eats it alive long enough to eat it again. It needs something to consume its seeds and deposit them in manure elsewhere.