We already mentioned the two conditions: no rain, which spells the end of much of life on Earth, and turning water into blood, which would have the same result.
(We; mentioned; the two conditions; T:already) (no rain, which spells the end of much of life on Earth, and turning water into blood; would have; the same result)
We no rain, which spells the end of much of life on Earth, and turning water into blood
mentioned would have
the two conditions T:already
the same result