Troll, Rattleback 2014

CR 7 giant

Large giant, chaotic evil

Armor Class: 16 (natural armor)
Hit Points: 126 (12d10+60)
Speed: 30 ft., climb 30 ft.

STR20 (+5)

DEX18 (+4)

CON20 (+5)

INT7 (-2)

WIS12 (+1)

CHA7 (-2)

Saving Throws: Constitution +8
Skills: Perception +1
Damage Immunities: poison
Senses: darkvision 60 ft., passive Perception 14
Languages: Common, Giant
Challenge: 7 (2,900 XP) · Proficiency Bonus +3

Distracting Rattle.

Its shell plates rattle constantly creating a droning distracting noise. When a creature casts a spell with verbal component while within 30' of the troll that creature must make DC 15 Con save or lose the spell.

Night Hunters.

While in dim light or darkness has advantage on Wis (Perception) checks that rely on sight.

Regeneration.

Regains 10 hp at the start of its turn. If it takes fire this trait doesn’t function at start of its next turn. It dies only if it starts its turn with 0 hp and doesn’t regenerate.

Source: Tome of Beasts 3 (Kobold Press) · License: OPEN GAME LICENSE Version 1.0a details