Fargo's Mod/Athenian Idol

The Athenian Idol is a item used to summon Medusa. It can be bought from after one has already been defeated and the world is in Hardmode.

The Athenian Idol will only work at night or if the player is underground (at or below the cavern layer). If used during the daytime or above the cavern layer, Medusa will not spawn and the item will not be consumed.