Suspicious Looking Tentacle

The Suspicious Looking Tentacle is an Expert Mode boss drop from the Moon Lord. When used, it will summon a small, tentacled, monocular follower who will provide light and closely follow you. The Eye grants the player capabilities of seeing hidden Treasure, Ores and Enemies. The Eye's pupil and iris expand whenever the player is nearby a Treasure or an Ore vein and they shrink when nearby Enemies or the player is moving. The Eye follows nearby Enemies(15-20 block radius), as well as the Treasure and Ores. The Eye also starts to glitter when the player is nearby said Treasure or an Ore vein.

Trivia

 * The sentence "I know what you're thinking" might be a reference to hentai, due to the fact that tentacles are sometimes being associated with it.
 * It can also be reference to the fact that items with "suspicious" in the name are boss summoning items.