Item: Blazer of Shellfish Summoning. Summoned creatures are yours to command, although they are limited to their standard skills, i.e. the blue crabs might irritate an enemy by pinching it but those scallops aren’t going to do you much good unless you need to filter some water or something, unless you just want to eat them.

Encounter: Skull-Eater, a small squirrel whose diet consists entirely of human(oid) skulls, using its large incisors to inflict a powerful bite that can reach through the chinks in armor. Although it has only one HP, its high evasion makes it hard to hit, its high Defense and Magic Defense
can reduce the damage of many weaker weapons and spells to 0, and its
attacks can easily kill a party member. When hit by magic, five copies
of it will appear.

Encounter: an Old Man of Coblenz (source), a completely normal human (retired thief) that when a young adventurer had a novice wizard cast Longstrider on him, but the spell went wrong. His legs are each 3m long, but since he has to move further with each stride it doesn’t actually make him walk any faster, plus his balance is atrocious and he has incredible trouble putting on his pants.