History Buff
3rd level Archaeologist feature
You gain proficiency in History and Investigation, and your proficiency bonus is doubled for any check you make with either skill. If you are already proficient in these skills you gain proficiency in another skill from the savant skill list.
Also, if you spend 1 minute examining an object you are holding, you can ascertain its value, origin, and age. If it has special properties, you learn them as well. This feature cannot be used to learn the properties of a devil fruit.
Daring Delver
3rd level Archaeologist feature
The places you explore have honed your instincts and given you insights into ancient items. You gain the benefits below:
You gain proficiency with whips and martial firearms.
You gain a climbing speed equal to your walking speed.
You gain advantage on skill checks when performing the Resarch downtime activity.
When you use your action to Search, Disengage, Use an Object or special item, you can make one attack as a bonus action.
You gain the ability to read and understand poneglyphs. If you spend at least 10 minutes with a poneglyph, you can make a copy of it in the form of an etch.
Ruin Explorer
6th level Archaeologist feature
You are well acquainted with danger. Your Profound Intellect bonus applies to Dexterity ability checks and saving throws.
In addition, when you are forced to make a saving throw to resist the effects of a Brawl technique or trap, you gain a bonus to your roll equal to your Intelligence modifier (minimum of +1). If a technique or trap allows you to take only half damage on a success, you instead take no damage if you succeed, and only half damage if you fail.
Lore Seeker
6th level Archaeologist feature
You constantly study every myth, legend, and folk tale you come across. If you observe a person, place, or object for at least 10 minutes, you can mystically recall information about it. The lore might consist of current tales, forgotten stories, or even secret lore that has never been widely known. The more information you already have about the thing, the more precise and detailed the information you receive is. The information you learn is accurate but might be couched in figurative language.
The target of this feature does not need to be of legendary importance in order for you to gain information. Though, if there is no relevant lore about the target you learn nothing. If you use this feature on a person with no Reputation (either Bounty or Honor) you learn nothing.
Finally, anytime you use an item that forces a target to make a saving throw, its save DC is equal to 8 + your proficiency bonus + your Intelligence modifier.
Hardy
13th level Archaeologist feature
You steel your resolve to uncover the mysteries of the world. You gain immunity to poison damage, and can ignore the effects of poison or disease.
As an action, you can roll a number of intellect die equal to your Intelligence modifier, gaining the amount rolled as temporary hit points for up to 1 minute. Once you use this feature, you can't do so again until you complete a long rest.
True Historian
17th level Archaeologist feature
Your exposure to ancient secrets and lore has caused you to develop an innate ward.
You can treat any History check roll of a 9 or under as an 10.
You gain resistance to damage from all special techniques.
You gain two additional Intellect die to use.