[When you cast a spell 1000 times, the damage of all skills will be permanently increased by +10000. At this time, your fireball spell is equivalent to TNT. 】
[You cast spells 300,000 times, permanently increasing the skill damage to +3 million. At this time, your fireball technique is equivalent to an atomic bomb explosion. 】
[You cast spells 80 million times, permanently increasing your skill damage by +800 million. At this time, your fireball technique is equivalent to a supernova explosion! 】
A global catastrophe is coming,
Lu Cheng returned from the apocalypse and returned to the first day of the disaster to unlock super god-level talents!
Endless Drain: Each time you cast a spell, the damage of all skills will be permanently increased by 10 points!
So, Lu Cheng silently stacked the layers and became invincible before he knew it.
The national war has begun and is besieged by the enemy’s coalition forces? It doesn’t exist. Do you understand the fireball deterrent?
A world-class BOSS with hundreds of millions of health points? I was hit by a fireball, what can I do?
God-level civilization invades and easily blows up the sun? My fireball technique is like the sun!
Until the gods joined forces to blockade and trapped Lu Cheng in the Forbidden Fire God Realm.
Lu Chengcai showed off the other 100 skills: “Who told you that I only know the fireball technique?”
- Description from novelbuddy
Chapter 26 
Chapter 168 Death of the God of Luck, Infighting among the Gods, Castle in the Sky
~ Postscript (the lake outside the window)
Volume 18 Chapter 8 part3