Adrian (2026-11-02): a second Eternatus appeared on his second visit
to the End; the attacks should be more visible.
- EndBoss waits until the entities around its spot are loaded before
deciding it's missing, refuses a second copy while the recorded one
is alive (join check, like the guardians), and removes extra copies
near the spot (cleans up worlds that already have two).
- Telegraphs: 2.2-size dust redrawn every 2 ticks, the inside filled
(Area.fill), rising sparks on the outline, a low bell on cast.
- Tests: no second End boss (after the End's middle is loaded), fill
points inside their areas.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
claudeandClaude Opus 5.5
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