Sango did evade the earth pillar that grazed his chin, now standing in front of him, only to be met with yet another surprise.
The earth pillar in front of him shattered into multiple fragments, the fragments scattering into the atmosphere and robbing Sango of his physical view.
Along with the shattered earth pillar came the appearance of something going through it and aiming her sword toward Sango's neck.
It was the same Ruby that Sango had earlier killed by ripping out her heart and freezing her body. That same Ruby is back to normal and has reappeared through the crack from the earth wall.
Getting out through the cracks, Ruby aimed the curved side of her long sword at Sango's neck. His right leg took a step back, his waist playing along by bending itself backwards. With such actions taken, Sango was barely able to evade the long sword, but not without it leaving its mark on his neck, a mark that was quick to close after a few droplets.