In the end, Isaac decided not to bother with the Staff of Deformation, leaving it with Jörmungandr. After all, he had to show the man some respect.
If the Staff of Deformation had perfectly housed the power of the Virtual Divinity and used Human Nature to devour Divinity, then no matter how special or coincidental its situation, Isaac would have fought Jörmungandr to the bitter end to take it back.
Because no matter how special or coincidental its situation was, with Isaac's Golden Finger, success would have been one hundred percent guaranteed.
The only difference would have been a matter of cost-effectiveness.
Unfortunately, the Staff of Deformation's situation was not only special, but also harbored a great hidden danger. With his current knowledge, Isaac had no idea how to resolve the issue. Therefore, it was useless to him.
In that case, it was better to do Jörmungandr a favor.
A favor owed by a veteran Wizard like him was quite valuable.
