Lodestone

What it is

A stat-category artifact that converts crate breaks into a temporary luck buff. Every time a supply crate is destroyed, Lodestone applies a flat bonus to the player’s luck stat for a short window, raising the odds of higher-rarity outcomes on level-up reward rolls during that window.

Identity

Field	Value
Name	Lodestone
Category	stat
Icon	🧭
Card description	When a crate breaks, your luck briefly surges.
Primary color	#ffcc66
Secondary color	#cc9933
Bright color	#ffe9aa
Damage tag	none (type-agnostic)

Per-tier values

Four data-defined tiers map to uncommon → rare → epic → legendary. The runtime prepends a fifth common tier that reuses the uncommon values record.

Tier	Rarity	Luck bonus (flat)	Duration (s)
0	Common (runtime-prepended, shares uncommon values)	40	10
1	Uncommon	40	10
2	Rare	60	12
3	Epic	90	15
4	Legendary	130	18

The shared card label across all tiers is “When a crate breaks, your luck briefly surges.”

Effect

Field	Value
Effect id	lodestone_buff
Trigger type	signal
Trigger signal	crate break
Conditions	none
Show banner	yes

Actions fired on every trigger, in order:

Order	Action	Parameters
1	modify stat	stat = luck; value = tier luck bonus; mode = flat; duration = tier duration; source tag = artifact:lodestone
2	flash artifact	none

Stacking rules

Field	Value
Stacking mode	refresh
Max stacks	1

Only one Lodestone luck buff is active at a time. Each new crate break refreshes the active buff’s remaining duration back to the full tier duration rather than adding a second stack or extending past the cap.

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Summary

Lodestone is the first stat-category artifact wired to the crate-break signal. Per-tier scaling moves both axes together — luck bonus rises 40 → 60 → 90 → 130 and duration rises 10 → 12 → 15 → 18 seconds. Stacking is refresh-only with a cap of one, so the buff acts as a single uptime window that resets on each crate break rather than accumulating. Source-tagged artifact:lodestone and accompanied by a banner plus an artifact flash on every proc.

EXTRACT-CANDIDATE flags

• EXTRACT-CANDIDATE: definition of the crate_break signal — where it is emitted, what payload it carries, and which other systems subscribe to it. Currently only one other artifact uses this source per the source comment; a signals reference page would centralize this.
• EXTRACT-CANDIDATE: definition of the modify_stat action shape — fields stat / value / mode / duration / source / stacking / maxStacks and how flat mode composes with the luck stat at runtime. Belongs on an effect-engine actions reference page.
• EXTRACT-CANDIDATE: stacking modes vocabulary — what refresh means versus other modes, and how maxStacks interacts with each mode. Belongs on an effect-engine stacking reference page.
• EXTRACT-CANDIDATE: how the luck stat translates into reward-card rarity odds at level-up. Belongs on a luck / rewards-rolling reference page.
• EXTRACT-CANDIDATE: the runtime-prepended common tier rule — how tier 0 reuses the uncommon values record and how the per-artifact flat passive bonus separately scales 10 → 50 across the five tiers. Belongs on the artifacts overview page.
• EXTRACT-CANDIDATE: the flash_artifact action — visual and audio behavior, and the procAudioCue field that Lodestone does not currently set. Belongs on an effect-engine actions reference page.