Kimilekki

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.

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.

A glabrezu's lies sustain them, and the truth can destroy them.

Whenever a revelation effect counteracts or reveals the glabrezu's illusions or the glabrezu fails a save against an effect that would prevent them from lying (such as Ring of Truth), the demon takes 5d6 mental damage.

They take this damage only once per effect, even if the effect reveals multiple illusions or prevents multiple lies.

When a reaction would disrupt the glabrezu's spell, the demon can attempt a DC 15 flat check check, avoiding the disruption on a success.

A glabrezu can always use Deception when rolling initiative as long as they're aware of at least one opponent before initiative is rolled.

When using Deception for initiative, the demon gains a +2 circumstance bonus to Deception.

A glabrezu's Illusory Disguise enables it to appear as a creature of any size.

Once per month, a glabrezu can grant a mortal humanoid the effects of a Miracle spell granted by an Abyssal patron, though the glabrezu always perverts the miracle according to their own treacherous nature.

The monster can instead use Grab and choose one creature it's grabbing or restraining with an appendage that has Grab to automatically extend that condition to the end of the monster's next turn.