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Hide (Dex; Armor Check Penalty)

Use this skill to sink back into the shadows and proceed unseen to approach a wizard's tower under cover of brush, or to tail someone through a busy street without being noticed.

Check: Your Hide check is opposed by the Spot check of anyone who might see you. You can move up to one-half your normal speed and hide at no penalty When moving at a speed greater than one-half but less than your normal speed, you take a -5 penalty. It's practically impossible (-20 penalty) to hide while attacking, running or charging.

For example, Lidda has a speed of 20 feet. If she doesn't want to take a penalty on her Hide check, she can move only 10 feet as a move action (up to a maximum of 20 feet in a round).

A creature larger or smaller than Medium takes a size bonus or penalty on Hide checks depending on its size category: Fine +16, Diminutive +12, Tiny +8, Small +4, Large -4, Huge -8, Gargantuan -12, Colossal -16.

You need cover or concealment (see pages 150-152, Player's Handbook) in order to attempt a Hide check. Total cover or total concealment usually (but not always; see Special, below) obviates the need for a Hide check, since nothing can see you anyway.

If people are observing you, even casually, you can't hide. You can run around a corner or behind cover so that you're out of sight and then hide, but the others then know at least where you went. If your observers are momentarily distracted (such as by a Bluff check; see below), though, you can attempt to hide while others turn their attention from you, you can attempt a Hide check if you can get to a hiding place of some kind. (As a general guideline, the hiding place has to be within 1 foot per rank you have in Hide.) This check, however, is made at a -10 penalty because you have so move fast.

Sniping: If you've already successfully hidden at least 10 feet from your target, you can make one ranged attack, then immediately hide again. You take a -20 penalty on your Hide check to conceal yourself after the shot.

Creating a Diversion to Hide: You can use Bluff to help you hide. A successful Bluff check can give you the momentary diversion you need to attempt a Hide check while people are aware of you.

Action: Usually none. Normally, you make a Hide check as part of movement, so is doesn't take a separate action. However hiding immediately after a ranged attack (see Sniping, above) as a move action.

Special: If you are invisible, you gain a +40 bonus on Hide checks if you are immobile, or a +20 bonus on Hide checks if you're moving.

If you have the Stealthy feat, you get a +2 bonus on Hide checks.

A 13th-level ranger can attempt a Hide check in any sort of natural terrain, even if it doesn't grant cover or concealment. A 17th-level ranger can do this even while being observed (see page 48, Player's handbook).

Expanded Description - Complete Adventurer

You can blend into a crowd, slip between areas of cover or concealment to maintain secrecy, sneak up on a foe, or tail a target.

Blend into a Crowd: You can use the Hide skill to blend into a crowd, but doing so conceals you only from someone scanning the area to find you. You remain visible to everyone around you, and if they happen to be hostile they're likely to point you out.

Move between Cover: If you're already hiding (thanks to cover or concealment) and you have at least 5 ranks in Hide, you can make a Hide check (with a penalty) to try to move across an area that does not offer cover or concealment without revealing yourself. For every 5 ranks in Hide you possess, you can move up to 5 feet between one hiding place and another. For every 5 feet of open space you must cross between hiding places, you take a -5 penalty on your Hide check. If you move at more than one-half your speed, you also take the normal penalty on Hide checks when moving quickly (-10 for moving faster than normal speed, or -5 for moving between half speed and normal speed).

You can also use this option to sneak up on someone from a hiding place. For every 5 feet of open space between you and the target, you take a -5 penalty on your Hide check. If your Hide check succeeds, your target doesn't notice you until you attack or make some other attention-grabbing action. Such a target is treated as being flat-footed with respect to you.

For example, Lidda the 2nd-level rogue could attempt to dash across a 5-foot-wide doorway without revealing her presence to the orcs inside. Even though the open doorway provides no cover or concealment, she can attempt a Hide check as normal, opposed by the orcs' Spot checks. She takes a -5 penalty on her check because of the distance involved, If she moved at more than half her speed, she would take an additional -1 or -10 penalty on the check depending on how fast she moved (see above).

Tail Someone: You can try to follow someone while remaining unseen. If you stay at least 60 feet away from your quarry, you must succeed on a Hide check (opposed by your quarry's Spot check) once every 10 minutes. At a distance of less than 60 feet, you must make a Hide check each round. Extraordinary actions on your part (such as spellcasting or attacking) may disrupt this attempt even if you do not fail a check.

Tailing someone still requires cover or concealment, as normal for attempting a Hide check, A moderately crowded street provides sufficient cover and concealment to accomplish this goal. Alternatively, you can duck between areas of cover or concealment, as described in Move between Cover (see above).

Even if you fail a Hide check while tailing someone or you are spotted while moving too great a distance between hiding places, you can attempt a Bluff check opposed by your quarry's Sense Motive check to look innocuous. Success means your quarry sees you but doesn't realize you're tailing him; failure alerts him that you're actually following. A modifier may apply to the Sense Motive check, depending on how suspicious your quarry is. The table below provides Sense Motive modifiers for particular situations.

Sense Motive
Your Quarry...DC Modifier
Is sure nobody is following-5
Has no reason to suspect anybody is following+0
Is worried about being followed+10
Is worried about being followed and knows you're an enemy+20

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