The Second And Third.

He can't tell what the concepts of the seeds of power are at a glance but he can identify which race it belongs to at a glance by identifying the laws contained within them. That way he can tell which concept it is. 

The Supreme Alliance didn't account for Legion-7 either. No one did because no one could. 

Legion-7 suggested, "I can just eat this seed of power even if you don't know what they do. That's better than wasting them for just a single point."

Legion-7 has become a devourer of law and seeds of power ever since Soverick comprehended a law and agitated the cosmic energy within Helios. He can't comprehend laws but he can add Authority to himself through devouring them. 

Legion-5 would have rolled his eyes if he had them. "And you wonder why the universe was like, 'this guy is an abomination. I must get rid of him."

"Ha. I couldn't be enslaved and I couldn't be digested by the universe. Nothing can put me down."