Warhammer Fantasy Battle.

It's set in the Mortal Realms, a cosmos of eight interlinked magical planes. The lore revolves around the conflict between the forces of Order, Chaos, Death, and Destruction.

 Key factions and alliances:

Order: Led by the God-King Sigmar, this alliance includes the celestial Stormcast Eternals, the forest-dwelling Sylvaneth, the magical Lumineth Realm-lords, and others.

Chaos: Devoted to the four Chaos Gods, this faction includes Khorne's Bloodbound, Nurgle's rot-spreading forces, and the treacherous Skaven led by the Great Horned Rat.

 Death: Commanded by Nagash, the god of death, this faction features legions of undead, including Nighthaunt spirits and the Flesh-eater Courts.

Destruction: Made up of savage, pillaging factions like the Orruks and Ogors, who wage war for the sheer thrill of it.