Hollow Knight Nightmare King Grimm: The Secret Weakness You NEED to Know - Critter Realm

August 8, 2026 · Critter Realm

Hollow Knight Nightmare King Grimm: The Secret Weakness You NEED to Know appears because speedrunners revisit Phase 2 patterns. Discussions on forums highlight precise hitboxes and timing.

Hollow Knight Nightmare King Grimm: The Secret Weakness You NEED to Know is a specific hurtbox behind its blade during certain attacks. Research shows punishing this opening slash staggers the boss. Studies indicate targeting this spot bypasses most of its defense.

Timing your dash through its swing gaps keeps pressure constant. You trade risk for consistent damage windows.

Why does this weakness matter for tough runs? Attack traces behind the right blade edge. Perfect reads cut encounter time and preserve mana.

How can players practice this safely? Use training fields to read telegraphs. Start with simple dashes, then layer nail combos.

What if I miss the sweet spot? Shift attacks to exposed limbs. Adjust spacing instead of mashing.

Can this method work on other Grimm fights? Yes, similar hurtboxes appear in related encounters. Adjust spacing for each variation.


Q: Does this weakness work with all nail upgrades?

A: Yes, any nail type can hit it if timing and angle align.

Q: Is learning this pattern safe for new players?

A: Train in safe areas first, then bring the frame-perfect dash into practice runs.

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