The Time Slot Core was the first thing the Duke encountered that involved rule power, something extremely rare.
At least at the Duke's current level, it was almost impossible to come into contact with such things.
Even if one could spend a huge cost to purchase something containing rule power, normally the Duke wouldn't be able to use it.
But the Time Slot Core is different. It is a treasure unique to the Sea Race, and using it doesn't require much power infusion or a high power level.
Just a little bit of Spiritual Power is enough to use the Time Slot Core.
The ability of the Time Slot Core can only be used once every three months and cannot be used frequently.
Because it is not driven by the user's own power, it needs to accumulate energy by itself.
The Time Slot Core is extremely rare, even within the Sea Race it is a very precious treasure.
