Because "Highschool" and "Darksiders" are often searched together, you may be looking for popular fanfiction crossovers, typically with the anime High School DxD . Darksiders II Ultimate Possessed Weapons creation guide

: They are rare red/orange drops. Equipping the Demon Heart Talisman (found in the second Death Tomb) will force almost all common weapon drops to become possessed.

: On some platforms, dropping and picking up a fully upgraded weapon may reset its level while keeping its boosted stats, allowing for infinite growth. 3. Darksiders + High School DxD Crossovers

Highschool Possession is a supernatural visual novel where the protagonist swaps bodies with his female classmates.