Short hops with upward strikes, plus smart use of Silkspear or Thread Storm, turn Sister Splinter from chaos into a controlled fight in Hollow Knight: Silksong.

Find the Sister Splinter arena

Step 1: From the central Shellwood bench, ride the lift upward via the pressure plate adjacent to the bench. This places you on the fast loop you’ll use for retries.

Step 2: Exit to the right at the top, continue through the room, then climb to the upper route and turn left.

Step 3: Cross the platforms and bounce off the white blooms to clear brambles, staying on the leftward path until the arena seals with thorny walls.

Know the fight: cues, space, and damage

Sister Splinter hangs to the ceiling for most of the encounter. Your goal is to maintain safe lanes by pruning hazards and eliminating summoned fliers before resuming upslashes on the boss.

  • Three-hit claw series: tracks you and alternates hands in a left-right-left rhythm; contact deals two masks.
  • Vines from the ceiling: telegraphed by falling debris/rays of light; they block space and deal one mask on touch; each vine breaks with three Needle hits (or a skill).
  • Summoned fliers (Splinterbarks): appear after the first stagger, one to two at a time from marked ceiling spots; their attacks deal two masks.
  • Stagger and fall: sufficient damage after claw windows drops her to the floor—steer clear when she falls and while grounded; contact still hurts.

Method 1: Silkspear control (adds-first, safest)

Step 1: During her claw strings, use short hops with quick upslashes. Do not overjump—colliding with her arms or body costs two masks. Aim for two to three hits, then reposition.

Step 2: Bank silk to delete threats on spawn. As soon as a flier appears at floor height, use Silkspear to one-shot it. If two spawn together, line them horizontally and spear through both.

Step 3: Keep only the lanes you need. When debris marks incoming vines that will box you in, either spear through a line of vines or break a single vine with three quick hits to restore a dodge lane.

Step 4: Use the best heal windows. Safest heals occur just after her third claw swipe, early in a vine summon (before she returns), during the summon scream, or immediately on stagger while keeping distance.

Step 5: Capitalize on staggers. When she drops, dash away from her landing, then take fast, grounded hits and reset. Never stand in contact range while she’s prone.

Method 2: Thread Storm AoE management

Step 1: Equip Thread Storm for a circular multi-hit around Hornet. It reliably clears close fliers and nearby vines while chipping the boss if she’s within range.

Step 2: Trigger Thread Storm on the first pair of fliers or when you’re getting cornered by intertwined hazards. This instantly resets space and removes the main source of chip damage.

Step 3: Rebuild silk with upslashes during her claw pauses. Aim for consistent two-hit cycles; reapply Thread Storm only when adds or dense vines threaten to trap you.

Method 3: Minimal silk — bait-and-clear

Step 1: Use positioning to have her claws break vines for you. Stay on the side with the most blockage so her downward swipes open lanes.

Step 2: Spawn trapping and undercuts: stand beneath a ceiling dust cue for a flier and jump-upslash three times immediately as it emerges. From directly below, its spin won’t parry your hits.

Step 3: If silk is scarce, keep one flier alive only long enough to bait it into her claw swipes or a falling vine, then finish it. Avoid prolonged two-flier pressure.

  • Reaper Crest: heavier, shorter-range kit that builds silk quickly via sustained upslashes and grants a wide crescent pogo for stable hits.
  • Warding Bell: start a heal to get a brief shield; if an attack connects, it counterblasts nearby threats, buying recovery time in tight spaces.
  • Thrown tools: spread pins or long pin can help snipe fliers or slice through vine lines when silk is reserved for healing.
  • Flea Brew (speed tonic): faster movement/attacks make the claw rhythm easier to dodge and accelerate silk generation.

Optimized timing, healing, and common pitfalls

Step 1: Dodge with intent: move opposite the glowing claw. A short dash into her arm’s direction during the early two hits can work, but reset wide for the third to avoid late tracking.

Step 2: Trim only critical vines. Over-clearing reduces your damage time and silk income; maintain one or two safe corridors and re-focus the boss.

Step 3: Respect contact damage at all times. When she staggers, dash clear first; then take quick hits. Avoid standing “on” her during any grounded state.

Step 4: Prioritize adds over heals. A single missed add often costs more masks than a delayed heal. Clear the flier immediately, then heal in the next window.

After the win: claim your upgrade

Defeating Sister Splinter opens the route to the right and upward where you can obtain the Cling Grip ability. This unlocks wall jumps and progression to higher tiers of Shellwood and beyond.

With adds neutralized on spawn and only essential vines removed, her predictable claw rhythm becomes straightforward—stay disciplined on windows, and you’ll secure Cling Grip quickly.