Suspicious Looking Tentacle

The Suspicious Looking Tentacle is an Expert Mode Light Pet summoning item. It summons a small tentacled eye (called the "Suspicious Looking Eye", but unrelated to the boss-summon item) that provides light and follows the player. The Suspicious Looking Tentacle is dropped by the Moon Lord's Treasure Bag in Expert Mode.

In addition to providing light, the Eye senses nearby enemies (15-20 block radius), treasure, and ores. This is shown via its pupil and iris pointing in the direction of the item sensed, as well as expanding for treasure, and contracting for enemies. The Eye also displays a glittering effect near ores and treasure.

Trivia

 * It is the only expert-exclusive item that doesn't have the Rainbow rarity.
 * The tooltip "I know what you're thinking..." likely references the fact that other items with the "Suspicious Looking" qualifier are summoning items for bosses. Oddly enough, the pet it summons is a miniature version of the True Eye of Cthulhu, and has the same name as the Suspicious Looking Eye used to summon the "normal" Eye of Cthulhu.

History
Tentacule Observatrice Suspicieuse