Diomedian Horse 2014

Advantage: smell Wis (Percept) checks.

Advantage on attacks vs. creature if 1+ unincapacitated attacker ally is within 5 ft. of target.

If the diomedian horse moves at least 20' straight toward a creature and then hits with Claw attack on the same turn that target must make DC 14 Str save or be knocked prone. If the target is prone the diomedian horse can make one Bite attack vs. it as a bonus action.