Overwhelmed

Slowly, but steadily the Army of the Undead was growing smaller and smaller.

Unfortunately, the accumulated energy of his Nurture ability did not have any considerable increase. 

As he was constantly on the run and fighting undead beings,  he had to use it too often.

This was disadvantageous because Kyle knew that he required much more energy to even consider fighting against the Death Knight and Dullahan.

Kyle was no match for their unrestricted strength. 

As such, even the thought of him fighting them in his current state was ridiculous. 

All he could hope for was that they would at least not kill him.

As such, he didn't stop using his entire efforts to decimate the Undead Army.

Finally, after an unknown amount of time, a large number of the Undead Army had been defeated. 

Now, only those undeads that were at the Late Fortification stage were left behind.