Quagga 2014
CR 4 monstrosity
Medium monstrosity, neutral
Has advantage on Wis (Perception) checks that rely on sight or smell.
When the quagga hits a creature with Twin Blade attack it doesn’t provoke opportunity attacks when it moves out of that creature’s reach.
Advantage on attacks vs. creature if 1+ unincapacitated attacker ally is within 5 ft. of target.
If the quagga moves at least 20' straight toward a target and then hits it with Twin Blade attack on the same turn that target must make DC 14 Str save or be knocked prone. If the target is prone the quagga can make one Hooves attack vs. it as a bonus action.
Bonus Actions
When the quagga reduces a creature to 0 hp with melee attack on its turn the quagga can move up to half its speed and make a Twin Blade attack.
Source: Tome of Beasts 3 (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details