An interruptible wind-up turns offense into a timed defensive response. Kern exposes a break rune before a radial slam; Tavi's first committed sword hit cancels it and opens a short punish. The second wind-up expires and the announced ring fires. Signal, qualifying action, deadline, cancellation, and fallback must remain distinct.

Open boss builder
Read and meet the deadlineAt 0.72 s Kern raises a break rune and a deadline gauge. Tavi commits to a sword strike; contact at 1.58 s meets the required impact before the 1.82 s cutoff.
Compare an interrupted cast with the same cast allowed to finish A stone boss charges a radial slam beneath a break rune and filling deadline gauge. A sword-bearing player closes in and breaks the first cast, leaving the boss staggered and the ring inactive. During a repeated cast the player retreats instead; the gauge fills, the full ring flashes as dangerous, and the player remains beyond its edge. Boss Player

At 0.72 s Kern raises a break rune and a deadline gauge. Tavi commits to a sword strike; contact at 1.58 s meets the required impact before the 1.82 s cutoff.

Implementation checklist

Define the interrupt signal, qualifying action, deadline, cancellation payoff, completed threat, and recovery.

Core checks

Three questions for the mechanic

  • What announces an interruptible action?

    Give the window a stable sign that is not reused for ordinary danger: here a break rune and filling bar appear from 0.72–1.82 s. The ring still previews the eventual threat, so the player can choose between interrupting and moving. Test the signal against effects, camera motion, color-vision filters, and reduced motion.

  • Which action interrupts, and when?

    Specify the required action, impact value, collision target, and inclusive deadline in game logic. Tavi's committed sword hit connects at 1.58 s and supplies one interrupt point; a light touch, miss, or hit after 1.82 s does not cancel the cast. Resolve simultaneous cutoff events deterministically and show insufficient impact differently from success.

  • What happens on both branches?

    On success, remove the pending hitbox immediately and hold Kern open until 2.55 s. On failure, close the interrupt marker, activate the exact previewed ring from 4.18–4.56 s, and keep an ordinary recovery afterward. Test both paths: a cancellation is legible only when the completed consequence is equally concrete.

Design mistakes

  • Any damage accidentally cancels the cast

    If chip damage and incidental projectiles trigger the same result, the mechanic becomes passive crowd control rather than a deliberate response. Gate cancellation on an explicit interrupt tag or impact threshold and retain ordinary damage feedback for rejected hits.

  • The deadline and hitbox disagree

    A bar that looks open after interruption has stopped accepting input creates false failures. Drive the marker, input rule, pending attack, and audio cutoff from one timeline boundary, then test hits one frame before, on, and after it.

Tuning

Tune the attack

  • Keep cancellation transactional

    When the qualified hit resolves, atomically mark the cast cancelled, remove its future damage event, play the break response, and start stagger. Seeking or rollback must reconstruct that state rather than firing the old event later.

  • Price the approach

    Tavi must enter sword range before the deadline, trading safer spacing for the stagger reward. Tune approach distance and wind-up duration together; the slowest supported movement route still needs a feasible response after recognition and input latency.

  • Preserve a fallback response

    Missing an interrupt should not automatically mean damage. The same preview communicates a second valid response: leave the ring. This keeps the mechanic useful for builds without the qualifying verb while preserving the stronger reward for players who commit.

  • Test ownership and edge cases

    Check simultaneous hits, multiplayer impact sums, invulnerable and phase-transition states, queued casts, death during wind-up, interruption on the cutoff frame, rollback, pause, slow motion, and whether removed damage can reappear after seeking.

Arena

  • A rune that can be cracked before it seals

    Kern lifts one bright break rune while stone energy gathers in the floor. Tavi's sword splits the first rune and the unfinished ring fades. The second rune seals, sending the stored force through the completed circle; one prop explains both opportunity and consequence.

Player upgrades

  • Use Tavi's existing sword verb

    The example needs no special counter item: a committed sword hit carries the interrupt tag. Other games can use a heavy attack, parry, spell, or team crowd-control total, but the accepted verb and its strength must be taught before a tight deadline is demanded.

Do not confuse this with

  • A cancellable action, not a universal stun

    A normal wind-up only announces when an action will resolve. A posture gauge accumulates progress across attacks. An interruptible wind-up exposes a bounded state on one pending action: a qualifying hit inside that state deletes the scheduled result and grants a defined cancellation response.

Bosses that use this mechanic

Learn more

Found an inaccuracy or have a suggestion for this page? Propose an edit on GitHub