Suspicious Grinning Eye

The Suspicious Grinning Eye is a Master Mode-exclusive drop from the Eye of Cthulhu. It summons a Suspicious Eye pet. It resembles to the Suspicious Looking Eye, having the Eye of Cthulhu's colors and opening its mouth when the player moves above a certain speed, referencing its second form.

Trivia

 * The pet itself has a striking resemblance to that of the Suspicious Looking Eye light pet summoned by the Suspicious Looking Tentacle item.