A debuff handoff assigns one harmful state to one player and lets it move to another through an explicit contact rule. A visible owner and countdown make the deadline legible; a reachable pass and brief return immunity prevent both unavoidable damage and accidental ping-pong.
At 0.70 seconds the boss applies one volatile rune to player 1. Its three-second countdown starts; without a pass it would burst at 3.70 seconds for 80 damage.
Reduced motion disables autoplay. Scrub to 0.70, 2.10, 2.32, 3.10, 4.55, and 5.60 seconds.
Specify acquisition, exclusive ownership, transfer radius, timing, duration reset, return immunity, expiry damage, invalid recipients, and authoritative event IDs.
Give the debuff one stable owner ID, one expiry timestamp, and an explicit acquisition event. Display the owner and remaining time in a way that can be read without color. Define whether the boss can retarget, copy, cleanse, or reapply the state; none of those happen in this demo.
Here the two player anchors must be within 76 scene units, both alive, the receiver not immune, and the source still before expiry. Resolve ownership atomically once per transfer ID. A pass restarts the three-second timer and protects the former carrier from receiving the rune for one second.
A missed pass deals 80 damage to the current owner once, not to everyone in range. Test early contact, a second collision during immunity, duplicate callbacks, dead or absent recipients, simultaneous contacts, late passes, and reset. Log owner and expiry before and after each event.
Continuous overlap may produce many contact callbacks. Apply return immunity and deduplicate event IDs so a single meeting creates exactly one ownership change.
A timer reset on any collision hides failed handoffs. Confirm a legal receiver and commit the owner change before restarting the countdown; otherwise preserve the old deadline.
Tune countdown, arena spacing, movement speed, collision radius, and post-pass separation together. The route should work without a hidden dash or invulnerability requirement.
Use one rune glyph attached to the current carrier, a numeric countdown, and a short transfer streak. The old carrier's immunity ring should look different from the live debuff.
Record encounter ID, pass ID, source, receiver, positions at contact, expiry before and after, immunity until, and result. Replaying or seeking a frame must not add extra passes or damage.
The boss sends a single volatile rune toward the first player. Two players cross a small gap to exchange it, step apart while the old carrier is protected, then meet for a deliberate return pass before the new deadline.
The same rule can use touch, a directed cast, or a marked tile, but the selected transfer range and excluded receivers must be explicit. In this contact variant, ordinary walking reaches both exchanges with time to separate.
Only one player carries the live rune at a time; proximity changes ownership rather than making both players share one hit. A tank swap instead changes who the boss targets with future attacks, while a handoff moves a timed status itself.
In Binding Coil Turn 2, Allagan Rot passes to another player through proximity before its timer expires. The former carrier cannot immediately receive it back. This makes carrier assignment and return eligibility central to the pattern; the demo shortens the timing and shows only two players.
Heroic Unbound Plague jumps to a nearby player and leaves Plague Sickness plus short bounce protection on the former carrier. Unlike the demo's reset-on-pass timer, its escalating damage and group-wide duration make repeated handoffs a resource-management problem.
In the Compost du grand Potofeu encounter, Dégénérescence can pass between allies, then be delivered to the boss to suppress regeneration. Keeping it costs the carrier health. This 2D example adds a destination and recipient exclusions to the basic player-to-player handoff.
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