Invisible Creature
'Invisible Creature' is a pattern that can be added to any creature that is indetectable by the routine use of senses until it has made an attack. This is most useful on corporeal creatures, since incorporeal creatures already have invisibility.
Invisible Creature can be used to model tribes of phase-shifted orcs, weird half-ghost hybrids, or just a pack of gnolls who got their hands on some alchemical goodies.
An Invisible Creature uses all of the base creature's statistics and abilities except as noted below.
CR
Same as base creature +2.
Size and Type
The creature's Size does not change. Its Type remains the same but it gains the subtype Invisible.
Initiative Modifier
The creature's initiative modifier increases by +2.
Senses
All senses such as scent, tremorsense, keen hearing, etc are unchanged. An Invisible Creature gains +2 on Perception skill rolls.
Armor Class
Same as base creature.
Hit Dice
Same as base creature.
Defensive Ability
An Invisible Creature gains the following abilities, which may be added to their Bestiary entry:
Aura: - Same as Base Creature
SR: -
Special Defenses: An Invisible Creature gains Greater Invisibility. This means they cannot be seen past 30 feet if they enter a Stealth Stance, plus many other advantages.
They may begin any encounter Invisible if they wish. When their Invisibility is broken (such as when they attack), they may re-activate this ability as a swift action once per encounter.
Immunities: Same as Base Creature.
Weaknesses: Same as Base Creature
Out of Combat
Same as Base Creature.
Speed
Same as Base Creature.
Melee Attacks
The Invisible Creature retains all the base creature's attacks . It gains a +2 untyped bonus on all attack rolls. When it attacks while Invisible, it gains the normal benefits from doing so, namely, attacks against enemies who can't see them are made with a +2 circumstance bonus to the attack roll, and the attack is made against that creature's flat-footed AC.
Damage
The Invisible Creature does the same damage and effects as the base creature.
Space and Reach
Same as Base Creature.
Offensive Ability
An Invisible Creature gains Greater Invisibility . This means they cannot be seen past 30 feet if they enter a Stealth Stance, plus many other advantages.
They may begin any encounter Invisible if they wish. When their Invisibility is broken (such as when they attack), they may re-activate this ability as a swift action once per encounter.
Ability Scores
All ability scores increase by +2.
Maneuver Offense and Maneuver Defense
Same as Base Creature.
Feats
Optionally, add one non-combat oriented feat, for flavor. Or just wing it! DM fiat is a wonderful thing.
Skills
Optionally, add one skill at CR+10.