Alluvion: Weakness, Battle Decisions & Recovery
Lightning is the useful damage plan for Water Shrine and Chapter 7 after Ignis. Water is ineffective in the shrine encounter; Prism Cores must be removed.
Quick answer
Lightning is the useful damage plan for Water Shrine and Chapter 7 after Ignis. Water is ineffective in the shrine encounter; Prism Cores must be removed.
On this page
Read this encounter
Check who is actually in the party and equip a healing Vision on an available member. Both the main boss and Prism Cores take useful Lightning damage, so you can cover them without abandoning the recovery role. Keep command access after any story-driven party change.
Answer the dangerous action
New cores take target priority before absorption strengthens Graceful Deluge. Return to the boss after clearing them and reassess whenever more appear. A break can stop a dangerous action when reachable; if absorption already happened, protect and heal rather than continuing an obsolete queue.
After the battle
At Lake Ryusei in Chapter 7, replace the Water plan used on Ignis with Lightning. Recheck resources between these fights, then continue toward Forest Path and Tellus.
Check command types and Stagger · All battle guides
Sources and verification
Reviewed 1 November 2026. This guide compares published references. Independent gameplay results and current-patch timing are not claimed; source-reported conflicts remain explicit.