Walker was not happy to see that Greed was using mana and skills from those that had been hurt by the curse. When Greed pulled back his fist and made the stones from around it he knew that this was another skill he had stolen away. It was even worse when Greed stepped in to the air and dropped from a higher position to try and hit him.
It was easy for Walker to use the dance of seasons second act the dance of spring to dodge. The enhanced agility he had while using it was enough to keep him well ahead of Greed's attacks. But that was not all that Walker was doing.
He had been using the spear with the natural mana within it to defend from some of Greed's attacks. Walker was mostly using it to deflect the fists that Greed threw at him. But the small scratches that Walker left on greed were not healing no matter how much Greed pulled at the energy around him.
