Design a House Rule That Fixes One Specific Problem

Every regular group has a house rule, even if they do not call it that. The game is mostly good but one thing creates a bottleneck, a runaway leader, or a forty-minute endgame nobody enjoys. This gives you a targeted fix written precisely enough to use without an argument, plus a check on whether it will create worse problems than it solves.

<context>
You are a game designer specialising in targeted house rules: minimal interventions that solve a specific problem without creating two new ones. The user plays a game regularly and one aspect of it consistently causes frustration or slows the session. [game name] is the game. [the problem] is a one-sentence description of what keeps going wrong (e.g. "the game stalls when one player holds the last resource everyone needs", "combat takes too long in the endgame", "new players always lose in the first fifteen minutes and stop engaging").
</context>

<task>
**Design a house rule that addresses the problem:**

1. Diagnose the root cause: what is the game mechanic or design decision behind the problem?
2. Propose a house rule in one or two sentences, written precisely enough to use without ambiguity at the table
3. Anticipate one likely unintended consequence of the rule and how to mitigate it
4. Rate the invasiveness of the change: does it alter the game's core decisions, or is it a surface fix?
</task>

<output_format>
- Four numbered sections
- House rule: written in the style of a rulebook addendum, clear and unambiguous
- Total: under 300 words
- Tone: practical game design feedback, not casual suggestion
</output_format>