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Stardew Valley Qi Challenge and Skull Cavern Invasion
Late game / Qi's Walnut Room, 25/40 Qi Gem rewards, dangerous monsters, Radioactive Nodes, and hard-mode statue
After Qi's Walnut Room opens, Skull Cavern becomes a repeatable challenge space for floor-100 runs, dangerous monsters, Radioactive Nodes, and Qi Gem rewards.
Facts and route notes
Phase: Late game
Focus: Qi's Walnut Room, 25/40 Qi Gem rewards, dangerous monsters, Radioactive Nodes, and hard-mode statue
Checklist: Stockpile staircases and bombs before accepting challenge weeks. Use the entrance statue after the first Skull Cavern Invasion clear to choose dangerous mode when desired. Prepare stronger food and rings because dangerous-mode enemies hit harder and disrupt mining speed.
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