Cat Ears

Cat Ears have no crafting recipe. A level 1 Thrifter sells them for 5 emeralds. Each Thrifter offers 2 of the 4 level 1 trades, so not every one has the ears.

While you wear them, hostile mobs within 16 blocks get a glowing outline, also through walls. The outline is drawn by your client: nobody else sees it.

Since 0.3.0 the ears move. They turn toward a hostile mob within 16 blocks, and they notice a Creeper or a Pink Creeper first, from 24 blocks. They flatten when a creeper hisses, when you take damage and under water. They droop below 40% health and in bed. In first person the ear tips show at the top edge of the screen, on the side of the mob they heard. Other players see the ears move too. Two client options turn this off: "Reactive ears and tails" and "Ear tips in first person".

An Oversized Hoodie and Cat Ears in a crafting grid become a Cat Ear Hoodie. The ears are used up.