Mercury

Mercury and Hermes are the two gods of speed. They both embody the idea of speed, each of them having 50% of all the speed in creation. While Hermes uses his concept wisely, Mercury tends to use it with greed, and this caused a messy rivalry between the twins.

At one point, Mercury tricks Hermes into giving his 50% of the idea to Mercury, and the result made Hermes a conceptless while Mercury embodied 100% off all speed in creation. At first he used his powers to casually aggravated others around him, which included the group of Divinities, easily wiping the floor with them, including Cole. However, it was this temporary moment of clowning around that gave the heroes time to form a plan with Hermes.

Eventually, Mercury grew bored, and he seeked higher goals, and that meant creation dominance. He required time to crumble Yggdrasil's Nexus since it was something beyond his power to destroy directly, so he destroyed the roots and attacked the goddess of nature to prevent Yggdrasil from properly regrowing until it would eventually die and collapse into a singularity. If the Nexus crumbled, Mercury could take the seeds of creation from within and make a new creation where he had complete dominance over it.

Unfortunately due to time to plan, Cole ended up with about 80% of all speed in creation. While this was still slower than Mercury since he held 100% of creation's speed, this was fast enough for Cole to keep up with Mercury.

After Mercury defeated Cole with moderate difficulty, he mocked Cole for thinking he ever stood a chance with a guy who embodied all of creation's speed. It was at this point that Mercury accidentally ended up saying that the reason he didn't kill Cole was because he was a large chunk of Mercury's power.

It was at that point that Cole quickly dashed away, and it took Mercury a while to realize his mistake before running after him, but by then it was too late, and Cole had Lloyd's butterfly swords in hand; one pointed at Mercury and the other resting close to Cole's neck. Mercury boasted that Cole's death will just make him a soul, and since he's a heroic person, he would keep his gift of powers, which included his speed. Cole pointed out that death by Lloyd's blade means no afterlife, so Cole would be gone forever, which meant a massive loss of speed for Mercury, slow enough for everyone else in creation to stop him.

Cole then gave the ultimatum of either giving up Hermes's power or suffer the consequences the result of Cole's death. After a bit of hesitation and some swearing under his breath, Mercury gave up and handed Herme's essence to Cole, ultimately making Cole the fastest thing in creation for that moment.

Cole then brought Mercury to Olympus for trial, and Mercury was banished to Exilium space, as well as stripped of his idea, having it given to Hermes so that Hermes could embody all speed in creation.