Tremorsense allows a monster to feel the vibrations through a solid surface caused by movement. It is an imprecise sense with a limited range (listed in the ability). Tremorsense functions only if the monster is on the same surface as the subject, and only if the subject is moving along (or burrowing through) the surface.
Telepathy 100 feet(aura, magical)
A monster with telepathy can communicate mentally with any creatures within the listed radius, as long as they share a language. This doesn't give any special access to their thoughts, and communicates no more information than normal speech would.
Constant Spells
A constant spell affects the monster without the monster needing to cast it, and its duration is unlimited. If a constant spell gets counteracted, the monster can reactivate it by spending the normal spellcasting actions the spell requires.
AC 41; Fort +31, Ref +30, Will +35 (+37 vs. emotion effects); +37 Will vs. emotion effects
Hollow Hush casts up to three spells chosen from its at-will innate spells and its emotional focus spells.
Feed on Emotion(attack, emotion, incapacitation, mental)
Frequency once per round
Effect Hollow Hush feeds on the emotional unrest of a single creature within 30 feet that's currently affected by an emotion effect. The target must succeed at a DC 41 Will save or take 5d10 mental damage and be Stunned for 1 round. If the target fails its saving throw, Hollow Hush regains the same number of Hit Points and Feed on Emotion does not cost Hollow Hush an action, allowing it to use another action this turn.
Rapid Strikes
Hollow Hush attempts three claw Strikes, each against a different target within reach. The multiple attack penalty applies to each attack, but increases only after all the attacks have been made.
Spiral of Despair(emotion, mental)
Trigger A creature fails a saving throw to resist one of Hollow Hush's innate spells or emotional focus spells
Effect As Hollow Hush invades the triggering creature's mind and plants the seeds of negative emotions, it also strips away the target's feelings of hope or positivity. Hollow Hush can immediately end a single emotion effect from which the triggering creature is benefiting.