After four days,
'Finally, I have got enough resources to help Dark Overlord break through to the Death Core Realm.'
After taking care of the day's Undead Beings, Ethan was ready to help his Undead Avatar.
'System, breakthrough.'
Without wasting any time, Ethan gave the command to the system.
'Swoosh'
Soon, the required resources for the Undead Avatar's breakthrough started turning into pure Death Essence and entered the Dark Overlord's skeletal body.
[300 Million Drops of Undead Marrow Essence are consumed (200 Million drops extra)]
[1000 Death Cores (900 Death Cores extra)]
[1000 Subdued Undead Warriors detected close by (900 Undead Warriors extra)]
Originally, Ethan thought he could increase the Undead Warriors under his Undead Avatar's command to 10,000; however, after gaining 1000 Undead Warriors, no other Undead Warriors acknowledged Dark Overlord.
Ethan didn't think much about it and concluded that it must be related to the Dark Overlord's current battle prowess.
