Kill-order inheritance turns target choice into a phase-design decision. Each boss has an identity and an authored successor package. When one falls, the survivor receives a readable transfer and commits to a different move. The player must be able to infer the branch before its new threat becomes active.

Open boss builder
Defeat the left body and read the waveTavi strikes the left body at 1.05 seconds. Its rune crosses to the surviving right body from 1.25 to 1.58, authorizing a stone wave rather than quietly adding damage. The wave is signaled before release.
Choose which of Kern's two stone bodies leaves its rune behind Two stone bosses stand apart. In the first attempt the left one falls, its rune flows right, and the survivor emits a circular wave while Tavi clears it. A visible reset restores the pair. In the second attempt the right one falls, its rune flows left, and the survivor fires a diagonal lance past Tavi's safe route. Boss Boss Player

Tavi strikes the left body at 1.05 seconds. Its rune crosses to the surviving right body from 1.25 to 1.58, authorizing a stone wave rather than quietly adding damage. The wave is signaled before release.

Implementation checklist

Define pair identities, first-defeat authority, both possible packages, inheritance timing, new telegraphs and hit geometry, health policy, simultaneous-defeat tie handling, one-grant limit, victory conditions, retry reset, accessibility, and branch telemetry.

Core checks

Three questions for the mechanic

  • Which event chooses the branch?

    Give the two bodies stable identities and record the first authoritative defeat, not the first hit or a visual death animation. Map each possible survivor to a named attack package. Resolve same-frame defeats deliberately; if both die, finish the pair rather than inheriting from a nonexistent survivor.

  • How does the survivor announce the new rule?

    Draw a transfer from the fallen source to the living recipient, then give the recipient a distinct anticipation pose and threat preview. Do not make the move active during the transfer. Derive its collision from the shown wave ring or lance lane and include the player's entire body in clearance tests.

  • How do branches survive retries and tuning?

    Grant exactly one package per pair and attempt ID. Clear pending transfers and the selected package on retry; keep completion separate from inheritance. Test both orders with low- and high-damage builds, simultaneous kills, repeated events, reconnects, and a player standing at each proposed safe route.

Design mistakes

  • The branch changes damage but not readable behavior

    A hidden multiplier makes target order feel like a trap. Give each survivor a visibly different move shape, signal, response and recovery, and show why the fallen body's rune matters.

  • Two grants race across the same transition

    If both defeat callbacks race, both packages can be applied or victory can be delayed. Use stable boss and attempt IDs, define same-frame priority, make the grant idempotent, and cancel pending transfer when the pair is truly finished.

Tuning

Tune the attack

  • Balance two paths rather than one preferred answer

    Compare total time, damage exposure, arena space, healing opportunity, and learning load on each branch. Different is more useful than simply easy versus hard; both paths should be viable without a required build.

  • Preserve cause and effect in the transition

    Keep the fallen body, recipient, and rune path on screen long enough to read. Start the warning after the transfer; an inherited beam must not hit a player before its lane is visible. Use shape and pose as well as color and sound.

  • Audit the event ledger

    Record source, survivor, package, attempt, grant count, and final outcome. Reproduce either branch by seeking, reset to the same baseline, and test a simultaneous defeat and duplicate network event without carrying an old package forward.

Arena

  • Each fallen stone leaves a different oath

    When Tavi fells the left echo, its round seal enters Kern and a wave rolls across the floor. The covenant rewinds for a second trial. When Kern falls first, his sharp seal moves to the echo, which draws a straight rune lance instead.

Player upgrades

  • Make both choices legible and reachable

    Avoid a branch that demands a particular damage type or travel speed. Give equivalent audio, text and shape cues, a visible safe route for the whole player body, and an explicit retry marker before showing the opposite order.

Do not confuse this with

  • Order-selected behavior, not a generic enrage

    Enrage usually scales one actor after a threshold. Kill-order inheritance maps the fallen actor's identity to a specific successor package. A related order-conditioned reaction can change the survivor without literally transferring a power; label that variant clearly.

Bosses that use this mechanic

Learn more

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