Usage patterns
怪奇な〈事〉a bizarre, eerie incident or occurrence
In this village, bizarre incidents have long occurred one after another.
〈事〉は怪奇極まるsomething is utterly bizarre/mysterious
The truth behind that case turned out to be utterly bizarre.
怪奇な〈物〉a grotesque, distorted-looking thing
The museum had several grotesque masks on display.