Effect
+1/2.5/5% Critical Chance Create 1 Solar Blade every +10/8/5 seconds (only when Solar Blade effect is active)
What Eternal Furnace does
Eternal Furnace is a common-rarity artifact in Sephiria. In the inventory grid it occupies its own space, and any tablets you place beside it multiply the effect shown above.
It counts toward the Solar Blade combo — pair it with other artifacts tagged Solar Blade to trigger that combo's set bonus during a run.
Data source
Effect text and rarity are taken verbatim from TEAM HORAY's Fan Kit catalog (game build 1.0.25, indexed 2026-08-11), reproduced for reference. We do not add inferred numbers or unlock conditions that the Fan Kit does not supply.