Spellcasting Raises My Ability Power, and All My Skills Are Divine

[Game-like Apocalypse + God-Tier Talent + Invincible Protagonist] Plain-language synopsis: In an apocalyptic cataclysm, demons descend, and a small number of people awaken supernatural talents. Xu Sheng, who transmigrated here, awakens an E-rank talent: Lightning Bolt. Fortunately, a cheat-like System arrives, awakening extraordinary spells. Every time he casts a spell, he permanently gains one point of Spell Power, and each point of Spell Power permanently increases the damage of all his skills by ten! As long as he stacks enough Spell Power, he can smash every god and demon across the heavens. From then on, Xu Sheng embarks on an invincible path. Invincible version: Decades into the Cataclysm Era, Xu Sheng gazes at the gods and demons descending from across the heavens, then looks at the little spell in his hand, now stacked with tens of millions of Spell Power. "A skill that deals over a hundred million damage. I wonder how you'll handle that?"