Slagworm, Iron Giant & Liquid Flame: Weakness, Battle Decisions & Recovery
Wind / Lightning magic / Water or Ice, respectively is the useful damage plan for Chapter 5, Sunioo and Nameless Ruins. Earth fails on Slagworm; Fire heals Liquid Flame.
Quick answer
Wind / Lightning magic / Water or Ice, respectively is the useful damage plan for Chapter 5, Sunioo and Nameless Ruins. Earth fails on Slagworm; Fire heals Liquid Flame.
On this page
Read this encounter
Collect Mysidia’s medicine before going to Sunioo. Slagworm’s Swallow can temporarily remove an actor, so interrupt it with a reachable break or ensure the survivors can heal. At the ruins, both guardians must be cleared; a single victory only advances the two-guardian objective halfway.
Answer the dangerous action
Iron Giant punishes physical attacks, including a physical Lightning spellblade. Bring Lightning magic instead. Liquid Flame also counters physical hits and can apply Reflect: remove that protection before reflecting ordinary spells onto your own party, or use a command category verified to bypass it.
After the battle
Complete both rooms, then follow the opened route. Tellus’s introduction is interrupted by story; the later library/tower progression leads to the real closing fight.
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.