you have honed your proficiency with the tools of your craft, granting you the following benefits:
- Increase your Constitution score by 1, to a maximum of 20.
- You gain proficiency in one tool set of your choice.
- Choose a set of tools and gain advantage on all checks involving that tool set.
- Gain expertise in one tool set of your choosing, which doubles your proficiency bonus for any ability checks with that tool set. This tool set must not already benefit from any feature doubling your proficiency bonus (it cannot stack).
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