Multiattack

The lake troll makes one bite attack and two claw attacks.

Bite

Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 9 (1d8 + 5) slashing damage.

Claws

Melee Weapon Attack: +8 to hit, reach 5 ft., one target. Hit: 14 (2d8 + 5) piercing damage. If the lake troll hits a creature with both claw attacks in the same turn, the target creature must make a successful DC 16 Dexterity saving throw or its weapon (if any) gains a permanent and cumulative -1 penalty to damage rolls. If the penalty reaches -5, the weapon is destroyed. A damaged weapon can be repaired with appropriate artisan's tools during a long rest.