Eyewear that lets Princess Donut see invisible creatures, uselessly far away when Carl is ambushed alone.
Fighting something he cannot see at the settlement gate, Carl reflects that invisible mobs were always a worry, but that Princess Donut's sunglasses can see them.
The thought is bitter rather than helpful: Donut and the glasses are twenty feet away behind thick foliage, so the item does him no good at all, and he has to improvise with a smoke curtain, Gunpowder, and finally his Ping spell.
A pair of sunglasses sized for a cat.
Donut's anti-invisibility gear, absent when Carl needed it.