Detect Thoughts (Su): A rakshasa can continuously detect thoughts as the spell cast by an 18th-level sorcerer (save DC 15). It can suppress or resume this ability as a free action.

Spells: A rakshasa casts spells as a 7th-level sorcerer, and can also cast 1st-level cleric spells as arcane spells.

Alternate Form (Su): A rakshasa can assume any humanoid form, or revert to its own form, as a standard action. This ability is similar to the alter self spell cast by an 18th-level sorcerer, but the rakshasa can remain in the new form indefinitely.

Spell Immunity (Su): Rakshasas ignore the effects of spells and spell-like abilities of 8th level or less, just as if the spellcaster had failed to overcome spell resistance.

Vulnerable to Blessed Crossbow Bolts (Ex): Any hit scored with a blessed crossbow bolt instantly slays a rakshasa.

Paralyzing Gaze (Su): Paralysis for 1d6 rounds, 30 feet, Fortitude save (DC 13).

Improved Grab (Ex): To use this ability, the rast must hit with its bite attack. If it gets a hold, it automatically deals bite damage.

Blood Drain (Ex): A rast drains blood from a grabbed opponent, dealing 1 point of temporary Constitution damage each round it maintains the hold.

Fire Subtype (Ex): Fire immunity, double damage from cold except on a successful save.

Flight (Su): A rast can fly as the spell cast by an 11th-level sorcerer, as a free action. A rast that loses this ability falls and can perform only partial actions.

Positive Energy Lash (Su): A ravid can make a touch attack or hit with a claw or tail slap attack to infuse a target with positive energy. The energy produces an unpleasant tingle in living creatures, and against undead foes (even incorporeal ones) it deals 2d10 points of damage.

Animate Objects (Su): Once per round, a random object within 20 feet of the ravid animates as though by the spell animate objects cast by a 20th-level cleric. These objects defend the ravid to the best of their ability, but the ravid isn't intelligent enough to give them specific commands.

Flight (Su): A ravid can fly as the spell cast by an 11th-level sorcerer, as a free action. A ravid that loses this ability falls and can perform only partial actions.

Improved Grab (Ex): To use this ability, the remorhaz must hit with its bite attack. If it gets a hold, it automatically deals bite damage and can attempt to swallow the opponent.

Swallow Whole (Ex): A remorhaz can try to swallow a grabbed opponent of Large or smaller size by making a successful grapple check. Once inside, the opponent takes 2d8+12 points of crushing damage plus 10d10 points of fire damage per round from the creature's blazing gut. A swallowed creature can cut its way out by using claws or a Small or Tiny slashing weapon to deal 25 points of damage to the remorhaz's gut (AC 20). Once the creature exits, muscular action closes the hole; another swallowed opponent must cut its own way out. The remorhaz's interior can hold two Large, four Small, eight Tiny, sixteen Diminutive, or thirty-two Fine or smaller opponents.

Heat (Ex): An enraged remorhaz generates heat so intense that anything touching its body takes 10d10 points of fire damage. This is usually enough to melt nonmagical weapons, but magic weapons get a Fortitude save (DC 18).

Tremorsense (Ex): A remorhaz can automatically sense the location of anything within 60 feet that is in contact with the ground.

Snatch (Ex): A roc that hits a creature of at least Small size, but no larger than Huge, with a claw attack attempts to start a grapple as a free action without provoking an attack of opportunity. If the roc achieves a hold, it can fly off with its prey and automatically make a bite attack each round in lieu of a claw attack. It can drop a snatched creature as a free action or use a standard action to fling it aside. A flung creature travels 90 feet and takes 9d6 points of damage. If the roc flings it while flying, the creature suffers this amount of damage or falling damage, whichever is greater.

Strands (Ex): Most encounters with a roper begin when it fires its strong, sticky strands. The creature has six such members that can strike up to 50 feet away (no range increment). A single attack with a slashing weapon that deals at least 10 points of damage severs a strand (AC 20).

Attach (Ex): If a roper hits with a strand attack, the strand latches onto the opponent's body. This deals no damage but draws the stuck opponent 10 feet closer each subsequent round (no attack of opportunity) unless that creature breaks free, which requires a successful Escape Artist check (DC 23) or Strength check (DC 19). The roper can draw in a creature within 10 feet of itself and bite with a +4 attack bonus, in that round.

Weakness (Ex): A roper's strands can sap an opponent's strength. Anyone caught by a strand must succeed at a Fortitude save (DC 18) or take 2d8 points of temporary Strength damage.

Fire Vulnerability (Ex): A roper takes double damage from fire attacks unless a save is allowed for half damage. A successful save halves the damage and a failure doubles it.

Rust (Ex): A rust monster that makes a successful touch attack with its antennae causes the target metal to corrode, falling to pieces and becoming useless immediately. The size of the object is immaterial-a full suit of armor rusts away as quickly as a sword. Magic armor and weapons, and other enchanted items made of metal, must succeed at a Reflex save (DC 20) or be dissolved. A metal weapon that deals damage to a rust monster also corrodes immediately. Wooden, stone, and other nonmetallic weapons are unaffected.