Medusa

Medusa is a Pre-Hardmode enemy, found at cavern level. Medusa would be essentially a tougher skeleton, if it weren't for her ability to inflict the Stoned debuff if the player is facing her, referencing the Medusa of mythology's ability to petrify people who look into her eyes. The debuff instantly deals damage and immobilizes the player, encaseing them in a pile of stone. While the stoned debuff is active, fall damage is increased, even with items that negate fall damage, such as the lucky horseshoe. The animation for Medusa's debuff gives you a split second to turn away or hit her to cancel her attack. If neither of these happen, she will petrify players looking towards her. She drops around 10 silver coins upon death (roughly 25 silver in an Expert world), as well as a chance of a Medusa Head to drop.