She managed to block that spear, but the subsequent Deathly Finger still struck her left hand.
If it had been a complete Giant's Body, she would have been immune to the instant death effect of the Undead Magic, but as it were, the already severely injured Flame Giant began to have its flesh eroded by the Power of Death from the eerie green ray.
Fortunately, the body of the Giant was massive enough that its weakened Life Force still withstood the hit, but the price paid was the complete withering of the entire left hand.
The subsequent red serpent was then able to hit the Giant's body without any hindrance.
If this had been normal poison mist, it would have been burnt away by the Cataclysmic Fire emanating from the Giant, but upon encountering the Cataclysmic Fire, the red serpent seemed to have found its relatives, directly merging into the fire.