GitHub PR #386 by @leiming2333 (this commit is substantially the PR: its blizzard particles and flash). The official
blizzard blows bottom-up (the owner's confirmation of 2026-10-08; community report 「谢拉格的效果特性不明显，暴风雪应该
从下向上刮」): snowflakes rise off the bottom edge on a crosswind (48, low 22; were 26 drifting down), 10 gust streaks
(low 4) race up through the field, and the cold flash goes from 0.35 / 0.8 s to 0.45 / 1 s. Counts, speeds and lives
are marked [ASSUMED] (a visual choice).
Added on top of the PR: the same 'chill' fx is also the coldWind of 灵知 S3 (失温症, at its start) and of 麦哲伦 S1's
pulse (every 3 s — 248 in one golden battle); the PR turned every one of them into the full-screen blizzard. Only the
bond's field-wide wind (the device emits no anchor unit) gets it now; an operator's own coldWind (`id` = the unit)
keeps the light flurry and the softer flash it had.
Tests: test/render/fxchill.test.js (2; the gust case fails on the parent). Display only: golden unchanged.
leiming2333
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