Doubled in power!
That was exactly like the Soul Consuming Enigmatic Jade!
The Chaos Blood Sword's Special Ability was to absorb blood, but combined with the Soul Consuming Enigmatic Jade, it was also able to absorb souls! Because of that, its energy absorption rate had also increased – and without the addition of the jade, it would be extremely difficult for the sword to absorb energy!
In other words, as long as the Reverse Blade Spiritual Jade on auction was paired with a Spiritual Item and with Special Abilities that complemented it, its destructive power would multiply by leaps and bounds!
To put it simply, without any sort of pairing, the two would just be separate Spiritual Items. Combining the two would make them into one extremely powerful Spiritual Item! If there was a fight involving both, the latter would definitely crush the former!