The Pioneer's experimental site was somewhat larger than Richard had imagined; thousands of kilometers wide, the Molten Sea was home to various semi-elemental creatures of varying sizes.
From Magma Sardines the size of a thumb to Magma Jellyfish the size of a wash basin, and from Flame Giant Lizards over ten meters long to Magma Whales over a hundred meters long—it had a complete range, from the smallest to the largest.
These semi-elemental creatures all possessed the bloodline of fire element creatures, which enabled them to live and reproduce in the Magma Sea. They formed a complete ecosystem in this Magma Sea area, with such delicate design that Richard almost believed it was naturally formed—if it weren't for the Pioneer's Crystal Pillars that stood within this domain.
Within this area of thousands of kilometers, large and small Crystal Pillars were erected, which was a significant basis for Ulysses to believe this was a Pioneer Relic.