For Rezen to use the potion he just got it is required for a seed to absorb the potion's properties. However, the seed couldn't just be any ordinary seed. He has to use the seeds that came from the plants that grew on his farm
These seeds grew from his farm and with their connection to the farm, these seeds could absorb the potion though it is limited
Until now, Rezen's farm could only grow Spirit Plants up to the 3rd cycle. The quality of his farm crops is limited to that as such, the fruits of the seed that absorbed the potion would also have diluted effects. It was simply perfect for Rezen since he cannot completely consume the potion in one go, it must be diluted so that his soul and body can safely absorb the potion's properties
Deciding not to waste any time, Rezen went to pick one of the seeds of normal plants that he use as his food
