Shimmer Seal 2014
CR 5 beast
Medium beast, unaligned
When the shimmer seal is on an icy surface or underwater, it is invisible. In all other terrain, the shimmer seal has advantage on Dexterity (Stealth) checks. Seals, other pinnipeds, and creatures chosen by the shimmer seal can see it.
The shimmer seal can move across and climb icy surfaces without needing to make an ability check. Additionally, difficult terrain composed of ice or snow doesn’t cost it extra movement.
When the shimmer seal is underwater, it can take the Dash action as a bonus action on each of its turns.
Actions
The shimmer seal makes two tusk attacks.
Melee Weapon Attack: +7 to hit, reach 5 ft., one creature. Hit: 14 (3d6 + 4) slashing damage.
Source: Tome of Beasts 2 (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details