RinoZ
In chapter 97 he spends 20 minutes nibbling on a condensed biomass ball and gains 8+1 biomass in the process before commenting he's in too much of a rush to consume the rest of the biomass in it. Which is kind of dubious since 8 per 20 minutes is 24/hr, which is 576/day, which is more biomass than he's consumed in the entire story. There's really no reason he shouldn't have consumed that biomass then, or this biomass now.
He did naw on a gravity bomb, but remarked on the impurity and the hardness of it. With the time they have, and how long it took for him with DENSE mana. It's probs too dense of a stone to eat. He didn't say this however and was icked by the dirt so... Could be the author doesn't want to power level the mc early or could be reasonable.