The Mage that owned the Greenhouse used to be a traveler, one who once traveled to a magical swamp to find a special flower, it was a dangerous swamp, filled with mystery as not many people managed to get out of it alive.
The mage found a corpse of a human male, mummified by the magical swamp's leaves and shrubs, but in the arms of the man was the Flower the mage was looking for.
The mage took the flower and the body decayed.
At the Greenhouse, the Mage grew the plant, but little did he know, the plant had a mysterious secret.

The plant grew and started to spew a bit of the Swamp's magical water, and after one day, there was the water, shaped like a human child, which is 3 days, grew into an Adult, shaped like the Mysterious Man in the Swamp.
The Water Creature was horrified and confused as seen by his gesture, and he couldn't speak, as he was water, but strangely it had a glowing visible Heart.