Research showed that when human evolvers absorbed Spirit Plant Extract, over ninety percent of them died outright. The few who survived suffered severe adverse reactions.
To put it simply, even if they didn't die, they'd be crippled.
However, this was only true for those who absorbed Spirit Plant Extract as an Evolutionary Material—meaning they had absorbed an extract one level higher than their own.
As a Saint-level Overlord who had evolved four times, Feng Bqing should have been absorbing a fifth-tier extract as his Evolutionary Material.
But the extract from the Spirit Root Tree only had some characteristics of a fifth-tier extract; it hadn't truly reached the fifth tier.
Therefore, Su Ze had no idea if it could actually poison Feng Bqing to death.
It was very possible it would just be like taking the wrong medicine—causing some adverse reactions, but nothing fatal.
