Stalemate

He had not forgotten about the esoteric substance primordial seed. According to Master Gremingar, it was a substance that could become anything. That was rather remarkable and clearly was something that held true given what the abyssfeeder displayed to him. It demonstrated many esoteric abilities that it developed on the spot to counter Rui, if he could tap into even a bit of that seemingly limitless power, perhaps he could become much stronger than he currently was.

He couldn't even imagine the sheer difficulty of such a task. This was an absurd hurdle that could not be overcome without immense effort and time. This was on a whole other level from simply grafting an esoteric substance deep inside his body. 

Furthermore, it was essentially impossible for him to ever reach the abyssfeeder's level, but that was fine, he did not need to get to that level to make a satisfactory application of the primordial seed substance.