Direct answer
Collect Sparks → Strengthen The Flame
Flame Altar And Base Improvements: Collect Sparks

Result
Collect Sparks → Strengthen The Flame
Game homeEnshroudedAll gamesExplore the world
Collect Sparks → Strengthen The Flame

Collect Sparks → Strengthen The Flame

Collect Sparks → Strengthen The Flame
Explore the world

Related content · quantity 1 · Acquisition: Found in Flame Shrines and Sanctums. A small amount of essence from the Flame! By feeding it back to the Flame Altar maybe it could become stronger and burn even brighter.

Related content · quantity 1 · Effects: Comfort - Flame: 1. Place this Flame Altar above the Shroud to mark your home. Build inside the marked area around the Flame Altar.

Related content · quantity 1 · Unshielded Fell: a melee enemy. Start with encounter references near Lost Villager Soul, then check the linked quests and materials.

Related content · quantity 1 · Fell spearman: a melee enemy. Start with encounter references near Lost Villager Soul, then check the linked quests and materials.