most interesting / useful / or-unique early level archetype class features

[Wonderstell]

Here's the first three archetypes I thought of. All abilities are given at level 1.

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Internal Alchemist

Breath Mastery:

At 1st level, the internal alchemist can control his breath and the flow of vital energy within his body. Without preparation, he can hold his breath for a number of minutes equal to his Constitution score (after this, he must begin making Constitution checks or risk suffocation); by spending a full-round action preparing himself, he can increase this duration to 1 hour per point of Constitution. The alchemist can survive twice as long as normal without food or water before he starts to take penalties. He can put himself into a state of suspended animation as a move action, and is then unconscious and appears completely dead; he awakens at a preset time or in response to a condition set by him when he enters this state.

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Oathkeeper Inquisitor

Divine Witness (Su):

Every oathkeeper inquisitor develops a unique personal symbol, which she can use to seal an agreement between two or more willing parties. The agreement, whether it’s a trade contract, a truce, or a political marriage, must be as detailed as possible and then signed in the oathkeeper’s presence by every creature involved. Creatures must sign of their own free will—any magical or physical coercion will cause the contract to crumble into ash when the oathkeeper attempts to place her seal upon it. So long as no mystic or physical force is influencing any participating creature, the oathkeeper can mystically seal the arrangement with her personal symbol, binding all signing parties into upholding their ends of the bargain for the length of time spelled out in the agreement.

Should any oathbound creature break the exact wording of the contract, the agreement is dissolved and the offending creature is cursed, taking a penalty on all d20 rolls equal to the oathkeeper’s Wisdom modifier for a number of weeks equal to the oathkeeper’s inquisitor level. Furthermore, the inquisitor’s symbol appears as a mystic symbol on the offending creature’s throat and hands, allowing the oathkeeper to know the creature’s location at all times, as per the discern location spell.

If a creature is forced into breaking the agreement by magic or overwhelming physical force (for example, breaking an agreement not to harm via a compulsion spell or by physically hurling an oathbound creature to deal damage to another), then the agreement dissipates harmlessly. The oathkeeper’s curse is a curse effect, but it can be removed only with a miracle or wish spell.

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Covenbane Slayer

Hag Sense:

A covenbane’s magical scars throb in the presence of magic. A covenbane adds half his level (minimum +1) on Perception, Sense Motive, and Survival checks to identify, recognize, or track a hag, arcane spellcaster, or creature with spell-like abilities. He can also use his hag sense to recognize whether someone within 30 feet of him is using magic to hide her true form. To do this, he must succeed at a Perception check against a DC equal to 15 + the target’s CR; success indicates the presence of a magical disguise, but it does not reveal the creature’s true form.

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Disrupt Coven:

Anyone the slayer threatens no longer counts as an ally for the purposes of friendly spellcasting or employing teamwork feats and cannot access any special abilities gained from being part of a coven (including coven spellcasting).

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