Dàzìrán de lìliàng shénqí de ràng rén wúfǎ jiěshì.
The power of nature is so magical it defies explanation.
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神奇 implies wonder and amazement, often with a positive connotation. It's less intense than 神圣 (shénshèng, sacred) but more magical than 奇怪 (qíguài, strange).