Start with this
What Stat Prisms do: Stat Prisms and Perfect Stat Prisms are stat-modification items used in the Upgrade Area to adjust a unit's base stat grades (Damage, Range, and SPA/Cooldown). According to community gameplay guides (including Gamepur), normal Stat Prisms reroll all base stats simultaneously with random variance, while Perfect Stat Prisms allow rerolling a single targeted stat at a time without altering your other grades. The codes currently listed active that award them are Update1 (10 normal + 10 Perfect Stat Prisms), AuraMonster (11 normal), and the status-disputed Origins (20 normal + 10 Perfect). 100K!, HappyPatch!, and TYKaito! moved to the expired-reported table on the September 14 cross-check, so their prism counts are last-reported values. Most sources and in-game notices report a Level 10 requirement to access the Codes button, though some release codes may work earlier; verify received items in your backpack after redemption. 'Stat Rerolls' is alternative community terminology, while 'Star Prisms' is a common misspelling. Save Perfect Stat Prisms for refining permanent endgame carries.