Capybear 2014
CR 1 monstrosity
Medium monstrosity, neutral
Can hold its breath for 30 min.
Advantage: smell Wis (Percept) checks.
Advantage on attacks vs. creature if 1+ unincapacitated attacker ally is within 5 ft. of target.
If the capybear moves at least 20' straight toward a creature and then hits it with Slam attack on the same turn that target must make DC 13 Str save or be knocked prone. If the target is prone the capybear can make one Bite attack vs. it as a bonus action.
Has advantage on Dex (Stealth) checks made to hide in swamps or muddy terrain.
Reactions
When another capybear within 5 ft. of this capybear is hit by an attack this capybear can leap in the way becoming the new target of the attack.
Source: Tome of Beasts 3 (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details