When the Ten Thousand Races Fall

[Spiritual qi revival + entire city clusters transported together + no heroine or one heroine + spirit-pattern cards + supernatural abilities + evolution + crystal cores + no System + not a bleeding-heart protagonist + not invincible + gods and demons + exotic beasts + ferocious beasts]

Three cultivation systems: the Demon Clan, the God Clan, and the Spirit Clan.

The Demon Clan's derivative system: a flesh-and-blood talent evolution system. Three major realms: Mortal Shedding → Transcendence → True Clan.

Mortal Shedding realm ranks: Black Iron → Ironblood Forged Bones; Bronze → Copper Skin, Furnace Organs; Silver → Silver Blood, Purified Body; Gold → Golden Muscles, Jade Bones. ...

The God Clan's derivative system: an innate supernatural core system. Cultivate spirit patterns and refine spiritual qi to achieve sacred marks, Dao patterns, and more...

The Spirit Clan's extended system: a system for elevating the mind and soul.

Mortal Shedding realm ranks: Mind-Gazing / Heart Lake / Spiritual Awareness / Heart Sea...

The protagonist awakens the ability known as the Eyes of Gods and Demons.

His left eye is the Demon Clan talent, the Scarlet Eye. Fueled by blood and qi, it multiplies his physical abilities across the board. It can also suppress others' power, and passively temper meat to convert it into blood and qi. The cost: burning blood and qi for too long depletes it, lowers his level, and plunges him into a bloodthirsty urge to kill, ultimately burning him to nothing.

His right eye is the God Clan supernatural core, the Azure Pupil. Powered by spiritual energy, it lets him see the paths taken by energy and spirit patterns, strengthens the power of the spirit-pattern cards he wields, reveals the rules governing spirit patterns, and exposes his opponents' weaknesses. The cost: prolonged use consumes vast amounts of spiritual energy. Once that runs out, it consumes his mental and spiritual strength, robbing him of his five senses and emotions, ultimately turning him into a puppet without feelings or a soul.