Thripper 2014
CR 6 humanoid
Medium humanoid, chaotic neutral
Can pinpoint by scent the location of fey within 60' of it and can sense the general direction of fey within 1 mile of it.
Its weapons are cold iron and are magical when used vs. fey. When it hits a fey with any weapon the weapon’s damage is force instead of its normal damage type.
Can fly up to 40' on its turn but must start and end its move on solid surface (roof ground etc.). If it is flying at the end of its turn it falls to the ground and takes falling damage.
Reactions
When creature thripper can see within 30' of it casts spell can counter the spell. This works like counterspell spell with +6 spellcasting ability check except thripper can counter only enchantment or illusion spells and it must make the ability check regardless of spell's level.
Source: Tome of Beasts 3 (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details